import time
from machine import Pin
led=Pin(0,Pin.OUT)
a=0
time.sleep(0.1) 
a=input("Introduce un numero")

if a.isdigit():
    for x in range(int(a)):
        led.on()
        time.sleep(1)
        led.off()
        time.sleep(1)
else:
    print("Error introduce un numero entero")