union {
   cylinder {
      <1, 0, 0>, <1, 1, 0>, 0.25
   }
   cylinder {
      <1, 0, 0>, <1, 1, 0>, 0.25
      rotate 120*y
   }
   cylinder {
      <1, 0, 0>, <1, 1, 0>, 0.25
      rotate 240*y
   }
   pigment { color rgb <0, 1, 1> }
}

disc {
   <0, 0, 0>, y, 3
   pigment { checker color rgb <1, 1, 1> color rgb <0, 0, 0> }
}

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

camera {
   location <1.5, 3, -1.5>
   look_at <0, 0, 0>
}