Button = show movieclip?

Hi

I am making a mp3 player, and i would like to have a “lamp to flash”(movieclip if posible) when i pause the player. My action script is until now this:

[AS]
var vol = new Sound();
pause.onPress = function() {
if (vol.getVolume() == 100) vol.setVolume(0);
else vol.setVolume(100);
};
[/AS]

Please help, thank you.
Bonna