from machine import Pin, PWM
from utime import sleep

led_pins = [1, 5, 9, 13]
leds = [PWM(Pin(pin), freq=1000) for pin in led_pins]
 
while 1:
s = input("command:")
if s=="off":
    for led in leds:
       led.duty_u16(int(0))
    
elif s=="25":
    for led in leds:
       led.duty_u16(int(0.25 * 65535))

elif s=="50":
    for led in leds:
       led.duty_u16(int(0.5 * 65535))

elif s=="75":
    for led in leds:
       led.duty_u16(int(0.75 * 65535))

elif s=="100":
    for led in leds:
    led.duty_u16(int(1*65535))


else:
        print("Invalid command. Please enter 'off', '25', '50', '75', or '100'.")