This simple script will generate random pixels on the raspberry pi senseHAT

sparkles.py

from sense_hat import SenseHat
from random import randint
from time import sleep
sense = SenseHat() # define the sensehat
while True:
	sense.low_light = True
	x = randint(0,7) # X coordinate of pixel
	y = randint(0,7) # Y coordinate of pixel 
	r = randint(0,255)
	g = randint(0,255)
	b = randint(0,255)
	sense.set_pixel(x, y, r, g, b)
	sleep(0.1)