Smiley.qml Example File

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 import Qt 4.7

 // This is taken from the declarative animation/basics/property-animation.qml
 // example

 Item {
     id: window
     width: 320; height: 480

     Image {
         anchors.horizontalCenter: parent.horizontalCenter
         y: smiley.minHeight + 58
         source: "../pics/shadow.png"

         scale: smiley.y * 0.5 / (smiley.minHeight - smiley.maxHeight)
     }

     Image {
         id: smiley
         property int maxHeight: window.height / 3
         property int minHeight: 2 * window.height / 3

         anchors.horizontalCenter: parent.horizontalCenter
         y: minHeight
         source: "../pics/face-smile.png"

         SequentialAnimation on y {
             loops: Animation.Infinite

             NumberAnimation {
                 from: smiley.minHeight; to: smiley.maxHeight
                 easing.type: Easing.OutExpo; duration: 300
             }

             NumberAnimation {
                 from: smiley.maxHeight; to: smiley.minHeight
                 easing.type: Easing.OutBounce; duration: 1000
             }

             PauseAnimation { duration: 500 }
         }
     }
 }