from machine import Pin 
from time import sleep

led=Pin(14,Pin.OUT)
sw1=Pin(2,Pin.IN)

while True:
    sw1_state=sw1.value()
    if sw1_state==1:
        led.value(1)
        sleep(.75)
        led.value(0)
        if sw1_state==1:
            led.value(1)
             sleep(.50)
            led.value(0)
            if sw1_state==1:
                led.value(1)
                sleep(.25)
                led.value(0)
                if sw1_state==1:
                    led.value(1)
                    sleep(.1)
                    led.value(0)