microbit.py

from microbit import *  
import radio


last_x = 2
last_y = 2

matrix = [0 for i in range(25)]

def chunks(l, n):
    n = max(1, n)
    return [l[i:i + n] for i in range(0, len(l), n)]

def get_index(raw_value, last_index):
    index = int(round((raw_value / 100) + 2, 0))
    return min(max(index, max(last_index - 1, 0)), min(last_index + 1, 4))

radio.on()

last_data = bytes([0 for i in range(25)])

mlimit = lambda x: 9 if x >= 9 else x

while True:
    for num in range(2):
        
        
        x = accelerometer.get_x()    
        y = accelerometer.get_y()    
        z = accelerometer.get_z()
     
        last_x = x = get_index(x, last_x)
        last_y = y = get_index(y, last_y)
       
        if not num:
            for i in range(5):
                for j in range(5):
                    value = matrix[j*5 + i]
                    if value > 0:
                        matrix[j*5 + i] = value - 1
        #display.clear()
        
        value = matrix[y*5 + x]
        value = 9#min(value + 1, 9)
        matrix[y*5 + x] = value
        radio.send_bytes(bytes(matrix))

        data = radio.receive_bytes()
        if data and len(data) == 25:
            last_data = data
            
        new_matrix = [mlimit(m + int(b)) for m,b in zip(matrix, last_data)]
        
        matrix_str = ":".join(["".join([str(cell) for cell in row]) for row in chunks(new_matrix, 5)])

        display.show(Image(matrix_str))
        
        #sleep(1)