from machine import Pin,Timer
from time import sleep

led1=Pin(2,Pin.OUT)
led2=Pin(3,Pin.OUT)
led3=Pin(4,Pin.OUT)

Timer1=Timer(period=1000,mode=Timer.PERIODIC,callback=lambda t1:led1.value(not led1.value()))
Timer2=Timer(period=500,mode=Timer.PERIODIC,callback=lambda t2:led2.value(not led2.value()))
Timer3=Timer(period=250,mode=Timer.PERIODIC,callback=lambda t3:led3.value(not led3.value()))

x=0
try:
    while True:
        print(x)
        sleep(1)
        x+=1
except KeyboardInterrupt:
    Timer1.deinit()
    led1.off()