imsize 600 200
eye 0 0 15
viewdir 0 0 -1
hfov 90
updir 0 1 0
bkgcolor 0.1 0.1 0.1

light 0 3 3 0 0.3 0.3 0.4

mtlcolor 0 1 0 1 1 1 0.2 0 0 1
sphere -10 0 0 2

mtlcolor 0 1 0 1 1 1 0.2 0.2 0 1
sphere -5 0 0 2

mtlcolor 0 1 0 1 1 1 0.2 0.4 0 1
sphere 0 0 0 2

mtlcolor 0 1 0 1 1 1 0.2 0.6 0 1
sphere 5 0 0 2

mtlcolor 0 1 0 1 1 1 0.2 0.8 0 1
sphere 10 0 0 2