PROTO state [
  eventIn SFNode effect
  exposedField MFColor color 0.2 0.2 0.4 
  ]{
  DirectionalLight { direction         0 -1 -1  }
  Viewpoint { position 0 0 30 }
  DEF BACK Background { skyColor IS color }
  Script {
  directOutput TRUE
  eventIn SFNode effect IS effect
  field SFNode back USE BACK
  url "javascript: