sphere {
   <0, 0, 0>, 1
   no_shadow
   pigment { color rgb <1, 0, 0> }
}

disc  {
   <0, -2, 0>, y, 4
   pigment { checker color rgb <1, 1, 1> color rgb <0, 0, 0> }
}

light_source { <10, 50, -10> color rgb <1, 1, 1> }

camera {
   location <0, 1, -4>
   look_at <0, -1, 0>
}