---
root:
  items:
    - type: rect
      bounds: 0 0 800 450
      color: red
    - type: radial-gradient
      bounds: 0 0 800 450
      center: 50 50
      radius: 60 60
      stops: [ 0.0, [255, 255, 255, 1], 1.0, [0,0,0,1] ]
      tile-size: 100 100
      tile-spacing: 20 20