DEF SPHERE_1 SphereTransform {
                                          sphereRadius 3.0
                                          sphereColor 1 0 0
                                  }
  
                                  DEF SPHERE_2 SphereTransform {
                                          sphereRadius 2.0
                                          sphereTranslation 5  0  0
                                          sphereColor 1 1 0
                                  }
  
                                  DEF SPHERE_3 SphereTransform {
                                          sphereRadius 1.0
                                          sphereTranslation 8  0  0
                                          sphereColor 1 1 1
                                  }
                          ]
                  }
          ]
  }