The way to dynamically create animation group in Qt Quick

gistfile1.txt

import QtQuick 2.0

Rectangle{
    id: container
    width: 800
    height: 800
    color: "black"
    Rectangle{
        id: rect
        width: 50
        height: 50
    }

    MouseArea{
        anchors.fill: parent
        onClicked: {
            var childAnimationObject = Qt.createQmlObject("import QtQuick 2.1; NumberAnimation {id: animation; properties: \"x,y\"; duration: 1000; from:50; to:600; easing.type: Easing.Linear }",container)
            childAnimationObject.target = rect
            var paraComponent = Qt.createComponent("./ParallAnimation.qml");
            var list = [];
            list.push(childAnimationObject)
            var paraAnimation = paraComponent.createObject(container,{"animations":list})
            paraAnimation.start();
        }
    }
}