Build a new Rubix Cube with a solved layout

Property definitions

rubix $ RubixCube :: solved
	# Build a new Rubix Cube with a solved layout
	init solved do
		var faces = new Array[Array[Array[Int]]]
		var colour = 0
		for i in [0 .. 6[ do
			var face = new Array[Array[Int]]
			faces.add face
			for j in [0 .. 3[ do
				var line = new Array[Int]
				for k in [0 .. 3[ do
					line.add colour
				end
				face.add line
			end
			colour += 1
		end
		init faces
	end
lib/rubix/rubix.nit:114,2--131,4