This library currently supports any board based on the ATmega168, ATmega328P, ATmega32U4, or ATmega2560 which runs at 8 MHz, 16 MHz, or 20 MHz. The LED strip's input connector has two pins that should ...

Print all three STL files. They could be printed completely using white plastic. Or change the material to black color after printing 1 mm of 'clock screen.STL' if you like it in such way, as i did it ...