# Peik Savonius

import time
from machine import Pin
from machine import Pin, PWM

led = PWM(Pin(15))
led.freq(1000)

while True:
    for i in range(-1, 60000, 2000):
        led.duty_u16(i)
        time.sleep(0.05)

    for i in range(60000, -1, -2000):
        led.duty_u16(i)
        time.sleep(0.05)

    time.sleep(1)
    led.freq(10)