png 120 120 hw1cubicg.png

xyc 100.5 30.5 #00ff00
xyc 23 99      #ff0000
xyc 10.5 20.5  #f12e3d
xyc 103 89     #123456
xyc 60 60      #fedcba

cubicg 1 2 3 4
cubicg 1 5 4 3
cubicg 2 4 1 3