from machine import Pin

red = Pin(1, Pin.OUT)
yellow = Pin(5, Pin.OUT)
green = Pin(9, Pin.OUT)

def blink(led, count):
for _ in range(count):
led.toggle()
utime.sleep(0.5)
led.toggle()
utime.sleep(0.5)

counter = 0
previous = 0
previous_previous = 1
while True:
counter = previous + previous_previous
blink(red, counter)
previous_previous = previous
previous = counter

counter = previous + previous_previous
blink(yellow, counter)
previous_previous = previous
previous = counter

counter = previous + previous_previous
blink(green, counter)
previous_previous = previous
previous = counter