gamer:bit + micro:bit = 5x5 canvas

main.py

MAX_B = 9
MAX_X = 5
MAX_Y = 5

b = MAX_B
x = 0
y = 0

d_s = [[0 for c in range(0, MAX_X)] for r in range(0, MAX_Y)]


def mr():
    global x
    x = x + 1 if x < MAX_X - 1 else MAX_X - 1


def ml():
    global x
    x = x - 1 if x > 0 else 0
    
    
def mu():
    global y
    y = y - 1 if y > 0 else 0


def md():
    global y
    y = y + 1 if y < MAX_Y - 1 else MAX_Y - 1
    

def bu():
    global b
    b = b + 1 if b < MAX_B else MAX_B
    
    
def bd():
    global b
    b = b - 1 if b > 0 else 0
    
    
def poff():
    global d_s, x, y
    d_s[x][y] = 0
    
    
def pon():
    from microbit import display
    display.clear()
    global d_s, x, y, b
    d_s[x][y] = b
    
    
actions = [mu, ml, mr, md, poff, pon, bd, bu]


def act(p):
    global actions
    actions[p]()
    
    
def up_d(d):
    global b, d_s, x, y
    d.clear()
    for col in range(0, MAX_X):
        for row in range(0, MAX_Y):
            d.set_pixel(col, row, d_s[col][row])
    d.set_pixel(x, y, b)
    
    
def init(d):
    global b, x, y
    d.clear()
    d.set_pixel(x, y, b)
    

def main():
    import microbit
    display = microbit.display
    sleep = microbit.sleep
    pins = [microbit.pin0, microbit.pin1, microbit.pin2, microbit.pin8, 
            microbit.pin12, microbit.pin16, microbit.pin5, microbit.pin11]
    pin_cnt = len(pins)
    for p in pins:
        p.set_pull(p.PULL_UP)
    
    init(display)
    
    while True:
        for p in range(0, pin_cnt):
            if pins[p].read_digital() == 0:
                act(p)
                up_d(display)
        
        sleep(100)


main()