A mix of effects for the 3D Xmas Tree from the PiHut (https://thepihut.com/products/3d-xmas-tree-for-raspberry-pi)

xmas_lights_mix.py

from gpiozero import LEDBoard
from time import sleep
from signal import pause

treelights=[ 18, 5, 9, 11, 21, 10, 7, 12, 6, 1,14, 3, 20, 24, 13, 15,2, 17, 16,                                                        23,8, 22, 4, 19 ]

treemap={ 1:4, 7:5, 16:6, 22:7, 6:8 , 14:9, 8:10, 21:11, 15:12, 3:13, 19:14, 2:1                                                       5, 9:16, 10:17, 20:18, 18:19,17:20, 4:21, 24:22, 23:23, 13:
24, 5:25, 12:26, 11:27
}

groups= [
        [ 18 ],
        [ 5, 9, 11, 21],
        [ 10, 7, 12, 6, 1, 14, 3 ],
        [ 20, 24, 13, 15 , 2, 17, 16, 23 ],
        [ 8, 22, 4, 19 ]
        ]

leds=LEDBoard(*range(4,28), pwm=True)

def labelToPin(l):
    return treemap[l]

def toBoard(l):
    return labelToPin(l)-4

def cascade():
    for i in treelights:
        sleep(0.1)
        leds.on(toBoard(i))

    for i in treelights:
        sleep(0.1)
        leds.off(toBoard(i))

def on():
    leds.on()

def off():
    leds.off()

def hoops():
    for treelights in groups[:-1]:
        for i in treelights:
            leds.on(toBoard(i))
        sleep(0.2)
        for i in treelights:
            leds.off(toBoard(i))
    for treelights in reversed(groups[1:]):
        for i in treelights:
            leds.on(toBoard(i))
        sleep(0.2)
        for i in treelights:
            leds.off(toBoard(i))

while(True):
    cascade()
    on();
    sleep(0.5);
    off();
    sleep(0.5);
    on();
    sleep(0.5);
    off();
    sleep(0.5);
    hoops();