hello.qml Example File

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 import QtQuick 1.0

 Rectangle {
     id: screen

     width: 800; height: 480
     color: "black"

     Item {
         id: container
         x: screen.width / 2; y: screen.height / 2

         Text {
             id: text
             anchors.centerIn: parent
             color: "white"
             text: "Hello world!"
             font.pixelSize: 60
             smooth: true

             SequentialAnimation on font.letterSpacing {
                 loops: Animation.Infinite;
                 NumberAnimation { from: 0; to: 150; easing.type: Easing.InQuad; duration: 3000 }
                 ScriptAction {
                     script: {
                         container.y = (screen.height / 4) + (Math.random() * screen.height / 2)
                         container.x = (screen.width / 4) + (Math.random() * screen.width / 2)
                     }
                 }
             }

             SequentialAnimation on opacity {
                 loops: Animation.Infinite;
                 NumberAnimation { from: 1; to: 0; duration: 2600 }
                 PauseAnimation { duration: 400 }
             }
         }
     }
 }