from machine import Pin
from machine import PWM
import time
 
# Create a PWM object in a pin
do=261
re=277
mi=293
pwm = machine.PWM(Pin(3))  # IN RP2040 the led is in 5
 
 
while True:
    pwm.duty_u16(40000) # volumenz
    pwm.freq(do)  # Nota
    time.sleep(1) # Tiempo de nota
    pwm.duty_u16(0) # Configure frequency at 5000 Hz
    time.sleep(0.01) # Resceso
    
    pwm.duty_u16(40000)
    pwm.freq(re)
    time.sleep(1)
    pwm.duty_u16(0)
    time.sleep(0.01)
    
    pwm.duty_u16(20000)
    pwm.freq(mi)
    time.sleep(1)
    pwm.duty_u16(0)
    time.sleep(0.01)
    
    pwm.duty_u16(20000)
    pwm.freq(do) 
    time.sleep(1)
    pwm.duty_u16(0)
    time.sleep(0.01)
    
# by asigning a value to x you can change the duty cycle