import time
import machine
from machine import Pin
time.sleep(0.1) # Wait for USB to become ready

print("Hello, Pi Pico!")
enable = Pin(21, Pin.OUT)
step = Pin(20, Pin.OUT)
direction = Pin(19, Pin.OUT)

enable.off() # Gotta get low to be high
direction.on()

while True:
    step.on()
    time.sleep_us(10)
    step.off()
    time.sleep_us(90)
BOOTSELLED1239USBRaspberryPiPico©2020RP2-8020/21P64M15.00TTT
A4988