from machine import Pin
import time

time.sleep_ms(100)

led = Pin(25, Pin.OUT)

on_time = int(input("Enter on-time in ms: "))
off_time = int(input("Enter off-time in ms: "))

while True:
    led.value(1)            
    time.sleep_ms(on_time)   
    
    led.value(0)             
    time.sleep_ms(off_time)