Counter

import microbit

count = 0
microbit.display.show(count)

while True:
    if microbit.button_b.is_pressed():
        count += 1
        microbit.display.show(count)
    sleep(200)

• Initialize an integer counter variable to 0.
• Display the initial value on the screen.
• Run an endless loop.
• Check for button B press on every iteration.
• If the button is pressed, increase the counter variable and display the new value.
• Sleep for 1/5 second.

Key concepts:

• a counter variable
• displaying a number on the screen
• checking for button presses