Transform {
  children [
  DEF S1 shape {
  translation 0 0 0
  color 0 0 1
  }
  DEF S2 shape {
  translation 2 1 0
  color 1 1 0
  }
  DEF S3 shape {
  translation 2 -1 0
  color 0 1 1
  }
  DEF S4 shape {
  translation 4 0 0
  color 1 0 0
  } ] }