import random
from machine import Pin, PWM
from utime import sleep

r = PWM(Pin(8, Pin.OUT))
g = PWM(Pin(9, Pin.OUT))
b = PWM(Pin(10, Pin.OUT))

r.freq(1000)
g.freq(1000)
b.freq(1000)

def interval_mapping(x, in_min, in_max, out_min, out_max):
    return (x-in_min) * (out_max - out_min) / (in_max - in_min) + out_min

def color_to_duty(rgb_value):
    rgb_value = int(interval_mapping(rgb_value, 0, 255, 0, 65535))
    return rgb_value

def color_set(r_value, g_value, b_value):
    r.duty_u16(color_to_duty(r_value))
    g.duty_u16(color_to_duty(g_value))
    b.duty_u16(color_to_duty(b_value))

while True:
    r = random.randint(0, 255)
    g = random.randint(0, 255)
    b = random.randint(0, 255)
    color_set(r, g, b)
    sleep(0.25)