qt-everywhere-src-5.15.1/qtdeclarative/tests/auto/quickwidgets/qquickwidget/data/animating.qml

import QtQuick 2.0

Rectangle {
    Rectangle {
        width: 100
        height: 100
        anchors.centerIn: parent
        color: "red"
        NumberAnimation on rotation { from: 0; to: 360; duration: 2000; loops: Animation.Infinite; }
    }
}