--- 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