wgd(g) = 0;

wgd(scenes)(cur)(instances) = {};

wgd(scenes)(cur)(instances)(left) = {
	(type, polygon),
	(mass, infinity),
	(vertices, {
		(0, {(x, 0), (y, 0)}),
		(1, {(x, 0), (y, 600)}),
		(count, 2)
	})
};

wgd(scenes)(cur)(instances)(right) = {
	(type, polygon),
	(mass, infinity),
	(vertices, {
		(0, {(x, 800), (y, 0)}),
		(1, {(x, 800), (y, 600)}),
		(count, 2)
	})
};

wgd(scenes)(cur)(instances)(bottom) = {
	(type, polygon),
	(mass, infinity),
	(vertices, {
		(0, {(x, 0), (y, 0)}),
		(1, {(x, 800), (y, 0)}),
		(count, 2)
	})
};

wgd(scenes)(cur)(instances)(top) = {
	(type, polygon),
	(mass, infinity),
	(vertices, {
		(0, {(x, 0), (y, 600)}),
		(1, {(x, 800), (y, 600)}),
		(count, 2)
	})
};