clip {
  clip: -50 -50 100 100;
  child: cross-fade {
    progress: 0.333333;
    start: color {
      bounds: 0 0 16384 16384;
      color: red;
    }
    end: color {
      bounds: -16384 -16384 16384 16384;
      color: blue;
    }
  }
}