eye 0 5 0
viewdir 0 0 1
updir 0 1 0
hfov 45
imsize 128 128
bkgcolor 0.5 0.7 0.9 1
light 0 -1 0 0 1 1 1
mtlcolor 1 1 1 1 1 1 0.2 0.4 0.6 60 0.2 1.5
sphere 0 6 15 3

mtlcolor 1 1 1 1 1 1 0.2 0.8 0 20 1 0
v 10 0 5
v -10 0 5
v -10 0 25
v 10 0 25

f 1 2 3
f 1 3 4