import max7219
from machine import Pin, SPI
from time import sleep

spi = SPI(0, baudrate=10000000, polarity=1, phase=0, sck=Pin(2), mosi=Pin(3))
ss = Pin(5, Pin.OUT)

msg = 'HELLO WORLD'
length = len(msg) * 8

display = max7219.Matrix8x8(spi, ss, 4)
display.brightness(10)
display.fill(0)
display.show()
sleep(0.5)

while True:
    for x in range(32, -length, -1):
        display.fill(0)
        display.text(msg, x, 0, 1)
        display.show()
        sleep(0.1)