from machine import ADC, Pin, PWM
import time

pot = ADC(Pin(26))
r = PWM(Pin(11)); r.freq(1000)
g = PWM(Pin(12)); g.freq(1000)
b = PWM(Pin(13)); b.freq(1000)

def color(red, green, blue):
    r.duty_u16(int(red/255*65535))
    g.duty_u16(int(green/255*65535))
    b.duty_u16(int(blue/255*65535))

def wheel(pos):
    if pos < 85:
        return (255 -pos*3, pos*3, 0)
    elif pos < 170:
        pos -= 85
        return (0,255-pos*3, pos*3)
    else:
        pos -= 170
        return (pos*3, 0, 255 - pos*3)

while True:
    value = pot.read_u16()
    pos = int(value / 65536*255)
    color(*wheel(pos))
    time.sleep(0.05)