root:
  items:
    - image: checkerboard(0, 2, 15)
      bounds: [10, 10, 30, 30]
    - image: checkerboard(0, 2, 15)
      bounds: [11, 10, 30, 30]
      clip-rect: [40, 10, 1, 30]
    - image: checkerboard(0, 2, 15)
      bounds: [11, 50, 30, 30]
      clip-rect: [11, 50, 29, 30]