like as in coding a function?
public void stopped()
{
// code to pause (or stop) the music here
}import greenfoot.*;
// class declaration statement
public class myWorld extends World
// *** end class header ***
// *** begin class code ***
{
// field declaration statement(s)
GreenfootSound backgroundMusic = new GreenfootSound("circles.mp3");
// *** begin instance object constructor(s) ***
public myWorld()
{
super(600, 400, 1);
backgroundMusic.playLoop();
// etc.
prepare();
}public void stop()
{
backgroundMusic.stopLoop();
}