from machine import Pin,PWM
import utime

L=[0,1,2,3,4]
sw=[5,6]
t=0.5

n=0
LEP=PWM(Pin(L[n]))
LEP.freq(1000)

pwd=65535/10

for x in range(10):
    for ud in range(10):
        LEP.duty_u16(int(pwd*ud))
        utime.sleep(0.05)
    for dd in reversed(range(10)):
        LEP.duty_u16(int(pwd*dd))
        utime.sleep(0.05)