camera cam1
{
  pixeldim  800 600
  worlddim  8 6
  viewpoint 4 3 2
}

material green
{
   ambient 0  4 0
}

material yellow
{
   ambient  4  3 0
}

plane leftwall
{
   material green
   normal 3 0 1
   point  1 0 0
}
plane rightwall
{
   material yellow
   normal -3 0 1
   point   7  0 0
}