Jun 2026

In our first Micro Python example, we saw how to turn on and off the onboard LED on the Pi Zero. But what is really cool to do is to flash the LED on and off. This means we can use the LED as an indicator of an error, or that something is running etc.

Lets write some more code in Thonny

Here is the full Micro Python code that we are using.

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# Import the picozero LED class
from picozero import pico_led

# Import the time module for delays
from time import sleep

# Create an LED object for the onboard LED
led = pico_led

# Run forever
while True:

    # Turn the LED on
    led.on()

    # Wait for 0.25 second
    sleep(0.25)

    # Turn the LED off
    led.off()

    # Wait for 0.25 second
    sleep(0.25)