# Imports go at the top
from microbit import *

x = 2
y = 2

while True:
    if button_a.get_presses():
        x -= 1
    if button_b.get_presses():
        x += 1
    if x < 0: x = 0
    elif x > 4: x = 4
    display.clear()
    display.set_pixel(x,y,9)
    sleep(100)