P.37 (Add All 12 White Keys)
public Piano() {
super(800, 340, 1);
// Width of piano: 800
// Width of 12 keys: 12 * 63 = 756
// Empty space = 800 - 756 = 44
// Half the space on each side = 44 / 2 = 22
for(int i=0; i<12; i++)
addObject( new Key("g", "3a.wav"),
22 + 32 + i*63, 140 );
}