Transform {
  children [
  Shape {
                  appearance Appearance {
                          material Material {
                                  diffuseColor 0 1 0
                              ambientIntensity 1
                                  emissiveColor 1 0 0
                          }
                  }
                  geometry NurbsCurve {
                          knot [0, 0, 0, .2, .4, .6, .8, 1, 1] 
                          tessellation 50
                          controlPoint [0 0 0, 1 1 0, 0 2 0, 2 3 0, -1 4 0, 5 5 0]
                  }
  }