/*
  This class extends the Beads class, which is a abstract class with a few basic
 methods. Most importantly, the Beads class has a messageReceived() method that
 may be overridden. Every time the clock ticks, it will send a message to an
 instance of Trigger and the messageReceived function is executed. In the 
 following code, we ask the clock what tick number it is on and we compute 
 the modulus 4 of that number. That gives us the oscillator number that should 
 be turned on (along with its corresponding led). All the others are turned 
 off.
 */

class Trigger extends Bead {
  void messageReceived(Bead message) {
    long b = cl.getCount() % 4;
    for (int i=0; i<4; i++) {
      if (b == i) {
        switches[i].on = true;
        wp[i].pause(false);
      } else {
        switches[i].on = false;
        wp[i].pause(true);
      }
    }
  }
}