an alternative programe for https://thepihut.com/blogs/raspberry-pi-tutorials/let-it-glow-maker-advent-calendar-day-4-brilliant-bar-graphs

knight-rider-fade.py

from machine import Pin, PWM
import time

# Set up LED pins
seg1 = Pin(13, Pin.OUT)
seg2 = Pin(12, Pin.OUT)
seg3 = Pin(11, Pin.OUT)
seg4 = Pin(10, Pin.OUT)
seg5 = Pin(9, Pin.OUT)


duty_cycle = 100 
# Create a list of our LEDs
segments = [PWM(seg1), PWM(seg2), PWM(seg3), PWM(seg4), PWM(seg5)]

frequency = 5000
for led in segments:
  led.freq (frequency)

power = [
    [65536, 1400,  0, 0, 0],
    [1400, 65536,  0, 0, 0],
    [400, 1400,  65536, 0, 0],
    [0, 400, 1400,  65536, 0],
    [0, 0, 400,  1400,  65536],
    [0, 0,   0, 65536,   1400],
    [0, 0,  65536, 1400, 400],
    [0, 65536, 1400, 400, 0],
    [65536, 1400, 400, 0, 0],
    ]




pause=0.2
try:
    while True:

      for seq in power:
        for i in range(5):
          segments[i].duty_u16(seq[i])
        time.sleep(pause)



    

except KeyboardInterrupt:
     print("Keyboard interrupt")
     for led in segments:
        led.duty_u16(0)