diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 7c326ae..973eaba 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -5,12 +5,9 @@
   </component>
   <component name="ChangeListManager">
     <list default="true" id="65f95bb6-3a86-4ed6-841e-441936291ad4" name="Default" comment="Rework Spot number">
+      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/src/Coffee/Queue.php" />
+      <change type="NEW" beforePath="" afterPath="$PROJECT_DIR$/tests/Coffee/QueueTest.php" />
       <change type="MODIFICATION" beforePath="$PROJECT_DIR$/.idea/workspace.xml" afterPath="$PROJECT_DIR$/.idea/workspace.xml" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/index.php" afterPath="$PROJECT_DIR$/index.php" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/src/Coffee/Map.php" afterPath="$PROJECT_DIR$/src/Coffee/Map.php" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/src/Coffee/Spot.php" afterPath="$PROJECT_DIR$/src/Coffee/Spot.php" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/src/Coffee/Tile.php" afterPath="$PROJECT_DIR$/src/Coffee/Tile.php" />
-      <change type="MODIFICATION" beforePath="$PROJECT_DIR$/tests/Coffee/TileTest.php" afterPath="$PROJECT_DIR$/tests/Coffee/TileTest.php" />
     </list>
     <ignored path="coffeetable.iws" />
     <ignored path=".idea/workspace.xml" />
@@ -39,7 +36,7 @@
       <file leaf-file-name="index.php" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/index.php">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="334">
+            <state relative-caret-position="1224">
               <caret line="68" column="17" selection-start-line="68" selection-start-column="17" selection-end-line="68" selection-end-column="17" />
               <folding />
             </state>
@@ -56,11 +53,11 @@
           </provider>
         </entry>
       </file>
-      <file leaf-file-name="TileTest.php" pinned="false" current-in-tab="true">
+      <file leaf-file-name="TileTest.php" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/tests/Coffee/TileTest.php">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="370">
-              <caret line="26" column="5" selection-start-line="26" selection-start-column="5" selection-end-line="26" selection-end-column="5" />
+            <state relative-caret-position="108">
+              <caret line="6" column="0" selection-start-line="4" selection-start-column="0" selection-end-line="6" selection-end-column="0" />
               <folding />
             </state>
           </provider>
@@ -69,7 +66,7 @@
       <file leaf-file-name="SpotTest.php" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/tests/Coffee/SpotTest.php">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="295">
+            <state relative-caret-position="504">
               <caret line="28" column="15" selection-start-line="28" selection-start-column="15" selection-end-line="28" selection-end-column="15" />
               <folding />
             </state>
@@ -79,7 +76,7 @@
       <file leaf-file-name="Spot.php" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/Coffee/Spot.php">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="181">
+            <state relative-caret-position="450">
               <caret line="30" column="19" selection-start-line="30" selection-start-column="19" selection-end-line="30" selection-end-column="19" />
               <folding />
             </state>
@@ -89,7 +86,7 @@
       <file leaf-file-name="TableTest.php" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/tests/Coffee/TableTest.php">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="161">
+            <state relative-caret-position="1728">
               <caret line="96" column="22" selection-start-line="96" selection-start-column="22" selection-end-line="96" selection-end-column="22" />
               <folding />
             </state>
@@ -99,8 +96,28 @@
       <file leaf-file-name="Table.php" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/Coffee/Table.php">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="323">
-              <caret line="81" column="23" selection-start-line="81" selection-start-column="23" selection-end-line="81" selection-end-column="23" />
+            <state relative-caret-position="316">
+              <caret line="111" column="33" selection-start-line="111" selection-start-column="33" selection-end-line="111" selection-end-column="33" />
+              <folding />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file leaf-file-name="Queue.php" pinned="false" current-in-tab="true">
+        <entry file="file://$PROJECT_DIR$/src/Coffee/Queue.php">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="90">
+              <caret line="5" column="14" selection-start-line="5" selection-start-column="14" selection-end-line="5" selection-end-column="14" />
+              <folding />
+            </state>
+          </provider>
+        </entry>
+      </file>
+      <file leaf-file-name="QueueTest.php" pinned="false" current-in-tab="false">
+        <entry file="file://$PROJECT_DIR$/tests/Coffee/QueueTest.php">
+          <provider selected="true" editor-type-id="text-editor">
+            <state relative-caret-position="234">
+              <caret line="13" column="26" selection-start-line="13" selection-start-column="26" selection-end-line="13" selection-end-column="26" />
               <folding />
             </state>
           </provider>
@@ -109,8 +126,8 @@
       <file leaf-file-name="Tile.php" pinned="false" current-in-tab="false">
         <entry file="file://$PROJECT_DIR$/src/Coffee/Tile.php">
           <provider selected="true" editor-type-id="text-editor">
-            <state relative-caret-position="666">
-              <caret line="38" column="16" selection-start-line="38" selection-start-column="16" selection-end-line="38" selection-end-column="16" />
+            <state relative-caret-position="288">
+              <caret line="38" column="25" selection-start-line="38" selection-start-column="25" selection-end-line="38" selection-end-column="25" />
               <folding />
             </state>
           </provider>
@@ -168,14 +185,18 @@
         <option value="/usr/share/nginx/html/coffeetable/tests/Coffee/TileTest.php" />
         <option value="/usr/share/nginx/html/coffeetable/src/Coffee/Table.php" />
         <option value="$PROJECT_DIR$/tests/Coffee/SpotTest.php" />
-        <option value="$PROJECT_DIR$/src/Coffee/Table.php" />
         <option value="$PROJECT_DIR$/src/Coffee/Position.php" />
         <option value="$PROJECT_DIR$/tests/Coffee/TableTest.php" />
-        <option value="$PROJECT_DIR$/src/Coffee/Tile.php" />
         <option value="$PROJECT_DIR$/src/Coffee/Spot.php" />
         <option value="$PROJECT_DIR$/index.php" />
         <option value="$PROJECT_DIR$/src/Coffee/Map.php" />
         <option value="$PROJECT_DIR$/tests/Coffee/TileTest.php" />
+        <option value="$PROJECT_DIR$/src/Coffee/Tile.php" />
+        <option value="$PROJECT_DIR$/src/Coffee/Table.php" />
+        <option value="$PROJECT_DIR$/src/Coffee/Stack.php" />
+        <option value="$PROJECT_DIR$/tests/Coffee/StackTest.php" />
+        <option value="$PROJECT_DIR$/tests/Coffee/QueueTest.php" />
+        <option value="$PROJECT_DIR$/src/Coffee/Queue.php" />
       </list>
     </option>
   </component>
@@ -219,10 +240,8 @@
     </include_path>
   </component>
   <component name="ProjectFrameBounds">
-    <option name="x" value="-2" />
-    <option name="y" value="-26" />
-    <option name="width" value="1444" />
-    <option name="height" value="899" />
+    <option name="width" value="1440" />
+    <option name="height" value="871" />
   </component>
   <component name="ProjectInspectionProfilesVisibleTreeState">
     <entry key="Project Default">
@@ -326,6 +345,52 @@
               <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
             </PATH_ELEMENT>
           </PATH>
+          <PATH>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="coffeetable" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="coffeetable" />
+              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
+            </PATH_ELEMENT>
+          </PATH>
+          <PATH>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="coffeetable" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="coffeetable" />
+              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="tests" />
+              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="Coffee" />
+              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
+            </PATH_ELEMENT>
+          </PATH>
+          <PATH>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="coffeetable" />
+              <option name="myItemType" value="com.intellij.ide.projectView.impl.nodes.ProjectViewProjectNode" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="coffeetable" />
+              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="src" />
+              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
+            </PATH_ELEMENT>
+            <PATH_ELEMENT>
+              <option name="myItemId" value="Coffee" />
+              <option name="myItemType" value="com.jetbrains.php.projectView.PhpTreeStructureProvider$1" />
+            </PATH_ELEMENT>
+          </PATH>
         </subPane>
       </pane>
     </panes>
@@ -434,14 +499,8 @@
       <workItem from="1458583053423" duration="2549000" />
       <workItem from="1458671080272" duration="2309000" />
       <workItem from="1458673405558" duration="654000" />
-      <workItem from="1458674128734" duration="1508000" />
-    </task>
-    <task id="LOCAL-00002" summary="Refactor coordinates in Tile from X,Y to col,row">
-      <created>1458140295782</created>
-      <option name="number" value="00002" />
-      <option name="presentableId" value="LOCAL-00002" />
-      <option name="project" value="LOCAL" />
-      <updated>1458140295782</updated>
+      <workItem from="1458674128734" duration="1662000" />
+      <workItem from="1458713666152" duration="1694000" />
     </task>
     <task id="LOCAL-00003" summary="Refactor Table.isValidFortile to couldContainTile">
       <created>1458141252466</created>
@@ -779,16 +838,17 @@
       <option name="project" value="LOCAL" />
       <updated>1458586130407</updated>
     </task>
-    <option name="localTasksCounter" value="51" />
+    <task id="LOCAL-00051" summary="Rework Spot number">
+      <created>1458675641510</created>
+      <option name="number" value="00051" />
+      <option name="presentableId" value="LOCAL-00051" />
+      <option name="project" value="LOCAL" />
+      <updated>1458675641510</updated>
+    </task>
+    <option name="localTasksCounter" value="52" />
     <servers />
   </component>
   <component name="TestHistory">
-    <history-entry file="Tests - 2016.03.22 at 19h 57m 49s.xml">
-      <configuration name="Tests" configurationId="PHPUnitRunConfigurationType" />
-    </history-entry>
-    <history-entry file="Tests - 2016.03.22 at 19h 59m 01s.xml">
-      <configuration name="Tests" configurationId="PHPUnitRunConfigurationType" />
-    </history-entry>
     <history-entry file="Tests - 2016.03.22 at 20h 00m 33s.xml">
       <configuration name="Tests" configurationId="PHPUnitRunConfigurationType" />
     </history-entry>
@@ -813,9 +873,15 @@
     <history-entry file="Tests - 2016.03.22 at 20h 40m 10s.xml">
       <configuration name="Tests" configurationId="PHPUnitRunConfigurationType" />
     </history-entry>
+    <history-entry file="Tests - 2016.03.23 at 07h 17m 40s.xml">
+      <configuration name="Tests" configurationId="PHPUnitRunConfigurationType" />
+    </history-entry>
+    <history-entry file="Tests - 2016.03.23 at 14h 31m 26s.xml">
+      <configuration name="Tests" configurationId="PHPUnitRunConfigurationType" />
+    </history-entry>
   </component>
   <component name="TimeTrackingManager">
-    <option name="totallyTimeSpent" value="9013000" />
+    <option name="totallyTimeSpent" value="10861000" />
   </component>
   <component name="TodoView">
     <todo-panel id="selected-file">
@@ -827,22 +893,22 @@
     </todo-panel>
   </component>
   <component name="ToolWindowManager">
-    <frame x="-2" y="-26" width="1444" height="899" extended-state="6" />
+    <frame x="0" y="0" width="1440" height="871" extended-state="6" />
     <editor active="false" />
     <layout>
       <window_info id="Project" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.17083333" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
       <window_info id="TODO" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32793018" sideWeight="0.5" order="6" side_tool="false" content_ui="tabs" />
-      <window_info id="Messages" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32793018" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
       <window_info id="Event Log" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="12" side_tool="true" content_ui="tabs" />
       <window_info id="Database" active="false" anchor="right" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
       <window_info id="Find" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32917705" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
       <window_info id="Version Control" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32917705" sideWeight="0.5" order="8" side_tool="false" content_ui="tabs" />
-      <window_info id="Run" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="true" show_stripe_button="true" weight="0.25561097" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" x="0" y="355" width="1446" height="188" />
+      <window_info id="Run" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25561097" sideWeight="0.5" order="2" side_tool="false" content_ui="tabs" x="0" y="355" width="1446" height="188" />
       <window_info id="Structure" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.24964234" sideWeight="0.5" order="1" side_tool="false" content_ui="tabs" />
       <window_info id="Terminal" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="10" side_tool="false" content_ui="tabs" />
       <window_info id="Favorites" active="false" anchor="left" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="2" side_tool="true" content_ui="tabs" />
       <window_info id="Debug" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32294264" sideWeight="0.5" order="3" side_tool="false" content_ui="tabs" />
       <window_info id="Cvs" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.25" sideWeight="0.5" order="4" side_tool="false" content_ui="tabs" />
+      <window_info id="Messages" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.32793018" sideWeight="0.5" order="7" side_tool="false" content_ui="tabs" />
       <window_info id="Message" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
       <window_info id="PHP-CGI Server" active="false" anchor="bottom" auto_hide="false" internal_type="DOCKED" type="DOCKED" visible="false" show_stripe_button="true" weight="0.33" sideWeight="0.5" order="9" side_tool="false" content_ui="tabs" />
       <window_info id="Commander" active="false" anchor="right" auto_hide="false" internal_type="SLIDING" type="SLIDING" visible="false" show_stripe_button="true" weight="0.4" sideWeight="0.5" order="0" side_tool="false" content_ui="tabs" />
@@ -938,26 +1004,10 @@
     <watches-manager />
   </component>
   <component name="editorHistoryManager">
-    <entry file="file://$PROJECT_DIR$/src/Coffee/Table.php">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="69" column="5" selection-start-line="69" selection-start-column="5" selection-end-line="69" selection-end-column="5" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
-    <entry file="file://$PROJECT_DIR$/../coffeetable_/src/CoffeeTable/Spot.php">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="0">
-          <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/src/Coffee/Position.php">
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="55" column="42" selection-start-line="55" selection-start-column="42" selection-end-line="55" selection-end-column="42" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -980,7 +1030,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="55" column="42" selection-start-line="55" selection-start-column="42" selection-end-line="55" selection-end-column="42" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -996,7 +1045,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="113" column="62" selection-start-line="113" selection-start-column="62" selection-end-line="113" selection-end-column="62" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -1228,7 +1276,6 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="2988">
           <caret line="166" column="38" selection-start-line="166" selection-start-column="38" selection-end-line="166" selection-end-column="38" />
-          <folding />
         </state>
       </provider>
     </entry>
@@ -1239,33 +1286,17 @@
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/tests/Coffee/TableTest.php">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="161">
-          <caret line="96" column="22" selection-start-line="96" selection-start-column="22" selection-end-line="96" selection-end-column="22" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/tests/Coffee/SpotTest.php">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="295">
+        <state relative-caret-position="504">
           <caret line="28" column="15" selection-start-line="28" selection-start-column="15" selection-end-line="28" selection-end-column="15" />
           <folding />
         </state>
       </provider>
     </entry>
-    <entry file="file://$PROJECT_DIR$/src/Coffee/Tile.php">
-      <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="666">
-          <caret line="38" column="16" selection-start-line="38" selection-start-column="16" selection-end-line="38" selection-end-column="16" />
-          <folding />
-        </state>
-      </provider>
-    </entry>
     <entry file="file://$PROJECT_DIR$/src/Coffee/Spot.php">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="181">
+        <state relative-caret-position="450">
           <caret line="30" column="19" selection-start-line="30" selection-start-column="19" selection-end-line="30" selection-end-column="19" />
           <folding />
         </state>
@@ -1275,13 +1306,12 @@
       <provider selected="true" editor-type-id="text-editor">
         <state relative-caret-position="0">
           <caret line="0" column="0" selection-start-line="0" selection-start-column="0" selection-end-line="0" selection-end-column="0" />
-          <folding />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/index.php">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="334">
+        <state relative-caret-position="1224">
           <caret line="68" column="17" selection-start-line="68" selection-start-column="17" selection-end-line="68" selection-end-column="17" />
           <folding />
         </state>
@@ -1295,18 +1325,50 @@
         </state>
       </provider>
     </entry>
+    <entry file="file://$PROJECT_DIR$/src/Coffee/Tile.php">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="288">
+          <caret line="38" column="25" selection-start-line="38" selection-start-column="25" selection-end-line="38" selection-end-column="25" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
     <entry file="file://$PROJECT_DIR$/src/Coffee/Table.php">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="323">
-          <caret line="81" column="23" selection-start-line="81" selection-start-column="23" selection-end-line="81" selection-end-column="23" />
+        <state relative-caret-position="316">
+          <caret line="111" column="33" selection-start-line="111" selection-start-column="33" selection-end-line="111" selection-end-column="33" />
           <folding />
         </state>
       </provider>
     </entry>
     <entry file="file://$PROJECT_DIR$/tests/Coffee/TileTest.php">
       <provider selected="true" editor-type-id="text-editor">
-        <state relative-caret-position="370">
-          <caret line="26" column="5" selection-start-line="26" selection-start-column="5" selection-end-line="26" selection-end-column="5" />
+        <state relative-caret-position="108">
+          <caret line="6" column="0" selection-start-line="4" selection-start-column="0" selection-end-line="6" selection-end-column="0" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/tests/Coffee/QueueTest.php">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="234">
+          <caret line="13" column="26" selection-start-line="13" selection-start-column="26" selection-end-line="13" selection-end-column="26" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/tests/Coffee/TableTest.php">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="1728">
+          <caret line="96" column="22" selection-start-line="96" selection-start-column="22" selection-end-line="96" selection-end-column="22" />
+          <folding />
+        </state>
+      </provider>
+    </entry>
+    <entry file="file://$PROJECT_DIR$/src/Coffee/Queue.php">
+      <provider selected="true" editor-type-id="text-editor">
+        <state relative-caret-position="90">
+          <caret line="5" column="14" selection-start-line="5" selection-start-column="14" selection-end-line="5" selection-end-column="14" />
           <folding />
         </state>
       </provider>
diff --git a/src/Coffee/Queue.php b/src/Coffee/Queue.php
new file mode 100644
index 0000000..b83dca0
--- /dev/null
+++ b/src/Coffee/Queue.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace Coffee;
+
+/**
+ * Class Queue
+ *
+ * @package Coffee
+ */
+class Queue {
+
+    /**
+     * @var array
+     */
+    private $queue = [];
+
+    /**
+     * @param $element
+     */
+    public function push($element) {
+        $this->queue[] = $element;
+    }
+
+    /**
+     * @return mixed
+     */
+    public function pop() {
+        return array_shift($this->queue);
+    }
+}
\ No newline at end of file
diff --git a/tests/Coffee/QueueTest.php b/tests/Coffee/QueueTest.php
new file mode 100644
index 0000000..9ee9e50
--- /dev/null
+++ b/tests/Coffee/QueueTest.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Coffee;
+
+// This is not necessary, since it is bootstrapped but serves for debugging purposes
+require __DIR__ . '/../../vendor/autoload.php';
+
+class QueueTest extends \PHPUnit_Framework_TestCase {
+
+    public function testPushPop() {
+        $queue = new Queue();
+        $queue->push('1');
+        $queue->push('2');
+        $queue->push('3');
+
+        $this->assertEquals('1', $queue->pop());
+    }
+}