public void controlEvent(ControlEvent theEvent) {
   if (theEvent.isController()) {
     if (theEvent.controller().name() == "Clear Screen") {
       background(255);
     }
     if (theEvent.controller().name() == "Leaf Red") {
       leafRed = theEvent.controller().value();
     }
     if (theEvent.controller().name() == "Leaf Blue") {
       leafBlue = theEvent.controller().value();
     }
     if (theEvent.controller().name() == "Leaf Green") {
       leafGreen = theEvent.controller().value();
     }
     if (theEvent.controller().name() == "Branch Random") {
       branchRandom = theEvent.controller().value();
     }
     if (theEvent.controller().name() == "Leaf Random") {
       leafRandom = theEvent.controller().value();
     }
     if (theEvent.controller().name() == "Leaf Size") {
       leafSize = theEvent.controller().value();
     }
     if (theEvent.controller().name() == "Start Size") {
       startSize = theEvent.controller().value();
     }
   }
 }