---
root:
  items:
    - type: stacking-context
      bounds: [0, 0, 800, 800]
      items:
        - type: rect
          bounds: [0, 200, 800, 5]
          color: [64, 64, 64, 1]
        - type: rect
          bounds: [100, 500, 100, 100]
          color: [0, 0, 255, 1]
        - type: rect
          bounds: [0, 500, 90, 5]
          color: [0, 0, 255, 1]
        - type: rect
          bounds: [0, 0, 90, 5]
          color: [255, 0, 0, 1]
        - type: rect
          bounds: [0, 300, 90, 5]
          color: [0, 255, 0, 1]
