---
root:
  items:
    - type: rect
      bounds: 0 0 800 800
      color: yellow
    # The backdrop-filter (invert) covers device [0, 300] (clipped to the
    # viewport from [-100, 300]); the backdrop there is yellow, inverted to blue.
    - type: rect
      bounds: 0 0 300 300
      color: [0, 0, 255, 1]
    # except over the magenta square at [50, 150], which inverts to green.
    - type: rect
      bounds: 50 50 100 100
      color: [0, 255, 0, 1]
