Stepping motor input for control

Projects Programming
4

I'm very sorry my message is not clearly, My English is not good :wink:

This code stepping motor control by potentiometer (V+ // A0 // GND) I want to replace potentiometer and use power supply 0-5vdc to control stepping motor.

for now if i input +5vdc to A0 stepping motor will turn right, input GND to A0 stepping motor will turn left