Try simplifying some of your statements to make the code more readable. For example...is the same as...
True, but the nested if test is better, in my opinion. Concentrate on one action at a time.
pretty simple setup. 2 buttons.
Perhaps you need a slightly more complicated setup that involves some switches, instead of shirt buttons, and some wires, too. You might also tell us exactly how those switches and wires are connected to the Arduino, and why you are not using the internal pullup resistors.