---
root:
  items:
    - type: stacking-context
      bounds: [0, 0, 420, 250]
      items:
        - type: border
          bounds: [ 0, 0, 200, 200 ]
          width: 10
          border-type: normal
          style: solid
          radius: 180
          color: blue
        - type: border
          bounds: [ 200, 0, 200, 200 ]
          width: 10
          border-type: normal
          style: solid
          radius:
            top-left: [180, 180]
            top-right: [0, 0]
            bottom-left: [0, 0]
            bottom-right: [180, 180]
          color: blue