from machine import Pin, 
import time

led = Pin(8, Pin.OUT)

time.sleep(1) # Wait for USB to become ready
led = machine.Pin(27, machine.Pin.OUT)

show_delay = 1.0   # smaller runs faster

while 1:
    time.sleep(show_delay)
    show_delay = show_delay * 0.95
    if show_delay < 0.001:
        show_delay = 0.8
    print('show_delay =', show_delay)
    led.toggle()