# Modules
from machine import Pin
from time import sleep, sleep_ms

# Essential pins
dir_pin = Pin(4, Pin.OUT) # Direction Pin
step_pin = Pin(16, Pin.OUT) # Step pin
button = Pin(15, Pin.IN, Pin.PULL_UP)

# Direction variable
direction = 1 # 1 initially
dir_pin.value(direction)

while True:
    # Button condition
    if button.value() == 0:
        direction = 1 - direction
        dir_pin.value(direction)
        print("Direction changed to", "Forward" if direction else "Backward")
        sleep(0.2) # Debounce delay

    # Controlling the speed of the stepper motor using timed delays
    # These numbers are random
    step_pin.on()
    sleep_ms(20)
    step_pin.off()
    sleep_ms(50)
    step_pin.on()
    sleep_ms(100)
    step_pin.off()