     init_mode("Pulse Mode");
     
     while (system_mode == 0) {
-      act_on_estop()
       read_controls();
       update_bottom_display_line();      
 

};

void read_controls() {
  // Read the potentiometers, and set the pulse width setpoint
  interrupter_pulsewidth_setpoint = constrain(
    map(analogRead(pulsewidth_pot), ANALOG_SCALE_MAX, ANALOG_SCALE_MIN, PULSEWIDTH_MAX, PULSEWIDTH_MIN),

    init_mode("Pink Noise");
    int delay_time;
    while (system_mode == 4) {
      read_controls();
      update_bottom_display_line();

