root:
  items:
    - type: rect
      bounds: [0, 0, 50, 50]
      color: green
    - type: rect
      bounds: [60, 0, 50, 50]
      color: green
    - type: rect
      bounds: [120, 0, 50, 50]
      color: green
    - type: rect
      bounds: [180, 0, 50, 50]
      color: green