from machine import Pin, PWM # import Pin and PWM classes
from random import randint # import randint function
import time # import time module

pins = [13, 12, 11] # set pins of RGB Led
freq_num = 10000 # set PWM frequency to 10kHz

pwm0 = PWM(Pin(pins[0])) # create PWM object from Pin13
pwm1 = PWM(Pin(pins[1])) # create PWM object from Pin12
pwm2 = PWM(Pin(pins[2])) # create PWM object from Pin11
pwm0.freq(freq_num) # set PWM frequency
pwm1.freq(freq_num) # set PWM frequency
pwm2.freq(freq_num) # set PWM frequency

def setColor(r, g, b): # define setColor function
    pwm0.duty_u16(65535 - r) # set PWM duty cycle
    pwm1.duty_u16(65535 - g) # set PWM duty cycle
    pwm2.duty_u16(65535 - b) # set PWM duty cycle

try: # if have no error, run the program between try: and except:
    while True: # create an infinite loop
        red = randint(0, 65535) # generate random number
        green = randint(0, 65535) # generate random number
        blue = randint(0, 65535) # generate random number
        setColor(red, green, blue) # set RGB Led color
        time.sleep_ms(200) # sleep 200 milliseconds

except: # if have error, run the program between except:
    pwm0.deinit() # turn off PWM
    pwm1.deinit() # turn off PWM
    pwm2.deinit() # turn off PWM