png 120 120 hw2bulbs.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 1 1 0
color 0 0 1
bulb -1

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

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

color 1 1 1
trif 1 2 3