# CircuitPython Blink Example

import time
import board
import digitalio
import pwmio

button = digitalio.DigitalInOut(board.GP0)
button.direction = digitalio.Direction.INPUT
led = pwmio.PWMOut(board.GP5, frequency=5000, duty_cycle=0)

#led = digitalio.DigitalInOut(board.GP5)
#led.direction = digitalio.Direction.OUTPUT

while True:
  if button.value == False:  

    for i in range(100):
        # PWM LED up and down
        if i < 50:
            led.duty_cycle = int(i * 2 * 65535 / 100)  # Up
            print("UP!")
        else:
            led.duty_cycle = 65535 - int((i - 50) * 2 * 65535 / 100)  # Down
            print("DOWN!")
        time.sleep(0.01)