Grid: 0, 0, 4, 4|4, 0, 8, 4|8, 0, 12, 4|12, 0, 16, 4|16, 0, 20, 4|20, 0, 24, 4|0, 4, 4, 8|8, 4, 12, 8|12, 4, 16, 8|16, 4, 20, 8|20, 4, 24, 8|0, 8, 4, 12|8, 8, 12, 12|12, 8, 16, 12|20, 8, 24, 12|0, 12, 4, 16|12, 12, 16, 16|20, 12, 24, 16|0, 16, 4, 20|4, 16, 8, 20|20, 16, 24, 20|0, 20, 4, 24|4, 20, 8, 24|8, 20, 12, 24|12, 20, 16, 24|16, 20, 20, 24|20, 20, 24, 24|24, 20, 28, 24|24, 36, 28, 40|28, 36, 32, 40|32, 36, 36, 40|36, 36, 40, 40