Colour Wipe

A colour wipe is when you light each pixel one at a time with a colour. A small delay is used between each lighting up neopixel so that the colour seems to be wiped across the chain. There are 3 functions to do this. The first wipes the colour according to the numerical order of the neopixels. The other two wipe the colour from the back to the front of the robot and vice versa.

from microbit import *

import neopixel

# Initialise neopixels

npix = neopixel.NeoPixel(pin13, 12)

# Define some colours

red = (255,0,0)

green = (0,255,0)

blue = (0,0,255)

nocol = (0,0,0)

# Colour wipe functions

def Wipe(col, delay):

    for pix in range(0, len(npix)):

        npix[pix] = col

        npix.show()

        sleep(delay)

    return

def WipeForward(col, delay):

    for pix in range(0, 6):

        npix[pix] = col

        npix[pix+6] = col

        npix.show()

        sleep(delay)

    return

    

def WipeBackward(col, delay):

    for pix in range(11, 5,-1):

        npix[pix] = col

        npix[pix-6] = col

        npix.show()

        sleep(delay)

    return    

    

while True:

    Wipe(red, 100)

    sleep(1000)

    Wipe(green, 100)

    sleep(1000)

    Wipe(blue, 100)

    sleep(1000)

    WipeForward(red, 100)

    sleep(1000)

    WipeForward(green, 100)

    sleep(1000)

    WipeForward(blue, 100)

    sleep(1000)

    WipeBackward(red, 100)

    sleep(1000)

    WipeBackward(green, 100)

    sleep(1000)

    WipeBackward(blue, 100)

    sleep(1000)