[
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		"appearance": {
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				{ "x": 12, "y": 0, "w": 6, "h": 2 }
			]
		}
	},
	{
		"name": "missile",
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				{ "x": 8, "y": 2, "w": 4, "h": 1 }
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		"yPeriod": 2500,
		"appearance": {"src": "lbj-1", "x": 1, "y": 4, "w": 5, "h": 6 }
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]