import machine
import neopixel
import time

# GP28 pin and number of LEDs
pin = 28
num_leds = 8   # change to how many LEDs you have

np = neopixel.NeoPixel(machine.Pin(pin), num_leds)

# Simple color helper
def set_color(r, g, b):
    for i in range(num_leds):
        np[i] = (r, g, b)
    np.write()

# Demo loop
while True:
    set_color(255, 0, 0)  # Red
    time.sleep(1)

    set_color(0, 255, 0)  # Green
    time.sleep(1)

    set_color(0, 0, 255)  # Blue
    time.sleep(1)

    set_color(0, 0, 0)    # Off
    time.sleep(1)