A quick and simple demo of the APA102_Pi library which fades the entire LED strip from green through to red then blue and back to green.

rainbow_all.py

#!/usr/bin/python3
import apa102
import signal
from time import sleep

numLEDs = 60
globalBrightness = 5
stepDelay = 0.1


strip = apa102.APA102(numLEDs=numLEDs, globalBrightness=globalBrightness, order='rgb') # Initialize the strip
strip.clearStrip()

# Clean up on Ctrl-C
def signal_handler(signal, frame):
    print("Ctrl-C pressed, clearing the LED strip.")
    strip.clearStrip()
    strip.cleanup()

signal.signal(signal.SIGINT, signal_handler)


while(True):
    for colour in range(255):
        for pixel in range(numLEDs):
            strip.setPixelRGB(pixel, strip.wheel( colour ) )
        strip.show()
        sleep(stepDelay)