<?xml version="1.0"?>
  <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
  
      <mx:Script>
          <![CDATA[
              import mx.effects.DefaultListEffect;
              import mx.collections.ArrayCollection;
              
              [Bindable]
              private var myDP:ArrayCollection = new ArrayCollection(
                  ['A','B','C','D','E','F','G','H']);
              
              private function deleteItem():void {
                  // As each item is removed, the index of the other items changes.
                  // So first get the items to delete, then determine their indices
                  // as you remove them.
                  var toRemove:Array = [];
                  for (var i:int = 0; i < list0.selectedItems.length; i++)
                      toRemove.push(list0.selectedItems[i]);
                  for (i = 0; i < toRemove.length; i++)
                      myDP.removeItemAt(myDP.getItemIndex(toRemove[i]));
              }
  
              private var zcount:int = 0;
              private function addItem():void {
                  // Always add the new item after the third item,
                  // or after the last item if the length is less than 3.
                  myDP.addItemAt("Z"+zcount++,Math.min(3,myDP.length));
              }            
          ]]>
      </mx:Script>
  
      <!-- Define an instance of the DefaultListEffect effect, 
           and set its fadeOutDuration and color properties. -->
      <mx:DefaultListEffect id="myDLE" 
          fadeOutDuration="1000" 
          color="0x0000ff"/>
  
      <mx:Panel title="DefaultListEffect Example" width="75%" height="75%" 
          paddingTop="10" paddingLeft="10" paddingRight="10" paddingBottom="10">
  
          <mx:List id="list0" 
              width="150"
              dataProvider="{myDP}" 
              variableRowHeight="true" 
              fontSize="18" 
              allowMultipleSelection="true" 
              itemsChangeEffect="{myDLE}"/>
      
          <mx:Button 
              label="Delete item" 
              click="deleteItem();"/>
          <mx:Button 
              label="Add item" 
              click="addItem();"/>
  
      </mx:Panel> 
  </mx:Application>