Coding error

don't worry i fixed it...thanks for trying to help do you know how to make sound play when i press run in greenfoot and stop when i press to start the actual game...i used Greenfoot.playSound("file") and when i press compile, i started playing automatically and when i pressed to play the game, it was still playing...do you know how to fix this problem???

You cannot control the sound when using the 'playSound' method of the Greenfoot class. You need to create a GreenfootSound object and use methods from its class to start and stop it. You can use a 'static' field to hold the GreenfootSound object in your World class. If you need to stop it from the 'StartButton' class (or whatever - or from any class other than that World class), you can use 'WorldClassName.sound.stop();' (NOTE: I names the GreenfootSound field 'sound'; and 'WorldClassName' should be the name of your world). You can use the World class method 'started' to put any code you want to execute when the 'Run' button is pressed.

sorry i don't really understand it, how would the code look

Please refer to the GreenfootSound API documentation for the constructor(s) and method(s) available.