png 120 120 hw2darkness.png

normal 2 0 -1
xyz    1 0 0

normal -1 2 -1
xyz    -1 1 1

normal -1 -2 -1
xyz    -1 -1 0

xyz 0 0 -2
color 3 2 1
bulb -1

xyz 0 0 0
color -2 -2 -2
bulb -1

color 1 1 1
trif 1 2 3