from machine import PWM,Pin
from time import sleep

S1=PWM(Pin (22),freq=50)
S2=PWM(Pin (4),freq=50)
S3=PWM(Pin (23),freq=50)
S4=PWM(Pin (12),freq=50)
P=Pin(14,Pin.IN,Pin.PULL_UP)

LISTA=[31,62,93,125]

d=0

while(1):
  if P.value()==0:
    d = d+1
    if d > 3:
      d=0

  if (d==0):
    for i in LISTA:
      S1.duty(i)
      sleep(0.5)

  elif (d==1):
    for i in LISTA:
      S2.duty(i)
      sleep(0.5)

  elif (d==2):
    for i in LISTA:
      S3.duty(i)
      sleep(0.5)

  else:
    for i in LISTA:
      S4.duty(i)
      sleep(0.5)