{
"elements":[
	{
		"type":"polygon",
		"data":{
			"points":[{"x":20,"y":30},{"x":20,"y":50},{"x":50,"y":100},{"x":20,"y":30}]
		}
	},
	{
		"type":"polygon",
		"data":{
			"points":[{"x":100,"y":100},{"x":100,"y":500},{"x":500,"y":500},{"x":100,"y":100}]
		}
	},
	{
		"type":"round",
		"data":{
			"x-axis":500,
			"y-axis":500,
			"angle":360
		}
	}
]


}