I understand how a basic comparator op amp works and how a capacitor charges individually, but I can't seem to put it all together to make this circuit. I think I might be messing up with the voltage rails and grounds somehow. The point of the circuit is for the LEDs to light up at ~2 second intervals. The output of the comparator is supposed to transition from -13V to 12V where Vcc is +-15V. The op amps are TL081CP if that information helps. If anyone could give me some tips of what I might be missing or possibly add to this diagram with a little more detail that would really help a lot.