Thank you it works now. My fret buttons that light up are just simply panels. So i added block s on the fretboard so that when the note s come down, they hit each other. My problem is, i don't know if it possible to basically tie the panels with the blocks so that when you press the green fret (or what ever fret) and the strum bar, the block that corrisponds with the fret pressed, the block will become un passable and enable impact with the note allowing you to "hit" the note. Basically my code looks similar to this. (keep in mind i am a definate noob at programming)

action green_block
{
MY.PASSABLE = ON;
MY.ENABLE_IMPACT = ON;
MY.EVENT = collide();
}

function collide()
{
if (joy_1 == on && key_cud == on && event_type == event_impact)
{
MY.PASSABLE = OFF;
beep();
}
}