import machine
import max7219

# Initialize SPI interface for MAX7219 driver
spi = machine.SPI(1, baudrate=10000000, polarity=0, phase=0)
ss = machine.Pin(15, machine.Pin.OUT)
display = max7219.Matrix8x8(spi, ss, 4)  # create a 4-module LED matrix display

# Define a simple graphic pattern
pattern = [
    [0, 1, 0, 0, 0, 0, 1, 0],
    [0, 0, 1, 0, 0, 1, 0, 0],
    [0, 0, 0, 1, 1, 0, 0, 0],
    [0, 0, 0, 1, 1, 0, 0, 0],
    [0, 0, 1, 0, 0, 1, 0, 0],
    [0, 1, 0, 0, 0, 0, 1, 0],
    [1, 0, 0, 0, 0, 0, 0, 1],
    [0, 0, 0, 0, 0, 0, 0, 0],
]

# Display the graphic pattern on the LED matrix
for row in pattern:
    for i, value in enumerate(row):
        display.pixel(i, len(pattern)-1-row.index(row), value)
display.show()