import lejos.nxt.*;

public class Program {

   public static void main(String[] args) throws InterruptedException {

      SensorPort.S1.addSensorPortListener(new SensorPortListener(){
         @Override
         public void stateChanged(SensorPort source, int oldValue,   int newValue) {
            if(newValue>1000)
               LCD.drawString("Released", 0, 0);
            else
               LCD.drawString("Pressed ", 0, 0);
         }
      });

      Button.waitForAnyPress();
   }
}