import machine
import time

# Set pin 0 as an output
led = machine.Pin(0, machine.Pin.OUT)

def blink_led(times):
    for _ in range(times):
        led.on()
        time.sleep(0.2)
        led.off()
        time.sleep(0.3)

print("Hello world!")
for i in range(5):
    print("Blink ", i, " times.")
    blink_led(i)         # Blink i times
    time.sleep(2)        # Wait for 2 seconds
print("Goodbye world!")