Java SE (Java Platform, Standard Edition)

import javax.sound.midi.*;

public class MiniMusicPlayer1 {

	public static void main(String[] args) {

		try {

			Sequencer sequencer = MidiSystem.getSequencer();
			sequencer.open();

			Sequence seq = new Sequence(Sequence.PPQ, 4);
			Track track = seq.createTrack();

			for(int i = 5; i < 61; i+= 4) {
				
				track.add(makeEvent(144,1,i,100,i));
				track.add(makeEvent(128,1,i,100,i+2));
			}

		sequencer.setSequence(seq);
		sequencer.setTempoInBPM(220);
		sequencer.start();
		} catch(Exception e) { e.printStackTrace(); }
	}

	public static MidiEvent makeEvent(int comd, int chan, int one, int two, int tick) {

		MidiEvent event = null;
		try {
			
			ShortMessage a = new ShortMessage();
			a.setMessage(comd, chan, one, two);
			event = new MidiEvent(a, tick);
		} catch (Exception e) { e.printStackTrace(); }

		return event;
	}
}

I can compile and run the program. But this does not terminates automatically. I have to use ctrl+c. Please help to find what goes wrong??