# Import the Pin class from the machine module.
# This allows us to control the RP2040's GPIO (General Purpose Input/Output) pins.
from machine import Pin

# Import the neopixel module.
# This provides functions for controlling WS2812 (NeoPixel) RGB LEDs.
import neopixel

# Import the time module.
# We'll use this to create delays with sleep().
import time


# The GPIO pin connected to the data input of the WS2812 LED.
# On many Waveshare RP2040 boards this is GPIO 16.
LED_PIN = 16


# Create a NeoPixel object.
#
# Pin(LED_PIN) tells MicroPython which GPIO pin is connected
# to the LED. The GPIO pin number is set by previous variable LED_PIN=16
#
# The second parameter (1) tells it there is only ONE RGB LED
# connected to this pin.
np = neopixel.NeoPixel(Pin(LED_PIN), 1)


# Start an infinite loop.
# Everything inside this loop will repeat forever.
while True:

    # Set LED number 0 (the first and only LED)
    # to the colour Red.
    #
    # Colours are stored as:
    # (Red, Green, Blue)
    #
    # Each value can range from:
    # 0   = Off
    # 255 = Maximum brightness
    #
    # So this means:
    # Red   = 255 (full brightness)
    # Green = 0
    # Blue  = 0
    np[0] = (8, 0, 8)    # I changed the colour from bright Red to a soft Purple.

    # Send the colour data to the LED.
    #
    # Changing np[0] only changes the value in memory.
    # The LED won't actually change until write() is called.
    np.write()

    # Wait for half a second.
    time.sleep(0.5)

    # Set the LED colour to black (off).
    #
    # Since all three colours are zero,
    # the LED turns off.
    np[0] = (0, 0, 0)

    # Update the LED so it turns off.
    np.write()

    # Wait another half second before repeating.
    time.sleep(0.5)
    
#other colours
    #(255, 0, 0),    # Red
    #(0, 255, 0),    # Green
    #(0, 0, 255),    # Blue
    #(255, 255, 0),  # Yellow
    #(255, 0, 255),  # Magenta
    #(0, 255, 255),  # Cyan
    #(255, 255, 255),# White
    #(0, 0, 0)       # Off