On the Pi Zero, we dont have pins PWM0 (pin #40) and PWM1 (pin #45)- those are not available on the PCB. That would normally be super :( :( but it turns out that while those pads are not exposed, we can re-route those signals to other pins that we can get to! You can get to PWM0 on GPIO #18 (ALT5) and PWM1 on GPIO #13 (ALT0) or GPIO #19 (ALT5) - see the full list of pins and alternate functions he