// SPDX-FileCopyrightText: 2018 Mikey Sklar for Adafruit Industries
//
// SPDX-License-Identifier: MIT

int brightness = 0;    // how bright the LED is
int fadeAmount = 5;    // how many points to fade the LED by
int counter = 0;       // counter to keep track of cycles

// the setup routine runs once when you press reset:
void setup()  { 
  // declare pins to be an outputs:
  pinMode(0, OUTPUT);
  pinMode(2, OUTPUT);
} 

// the loop routine runs over and over again forever:
void loop()  { 
  // set the brightness of the analog-connected LEDs:
  analogWrite(0, brightness);
  
  // change the brightness for next time through the loop:
  brightness = brightness + fadeAmount;

  // reverse the direction of the fading at the ends of the fade: 
  if (brightness == 0 || brightness == 255) {
    fadeAmount = -fadeAmount; 
    counter++;
  }     
  // wait for 15 milliseconds to see the dimming effect    
  delay(15); 

// turns on the other LEDs every four times through the fade by 
// checking the modulo of the counter.
// the modulo function gives you the remainder of 
// the division of two numbers:
  if (counter % 4 == 0) {
    digitalWrite(2, HIGH);
  } else {
   digitalWrite(2, LOW);
  }  
}

// SPDX-FileCopyrightText: 2018 Mikey Sklar for Adafruit Industries
//
// SPDX-License-Identifier: MIT

int brightness = 0;    // how bright the LED is
int fadeAmount = 5;    // how many points to fade the LED by
int counter = 0;       // counter to keep track of cycles

// the setup routine runs once when you press reset:
void setup()  { 
  // declare pins to be an outputs:
  pinMode(0, OUTPUT);
  pinMode(2, OUTPUT);
} 

// the loop routine runs over and over again forever:
void loop()  { 
  // set the brightness of the analog-connected LEDs:
  analogWrite(0, brightness);
  
  // change the brightness for next time through the loop:
  brightness = brightness + fadeAmount;

  // reverse the direction of the fading at the ends of the fade: 
  if (brightness == 0 || brightness == 255) {
    fadeAmount = -fadeAmount; 
    counter++;
  }     
  // wait for 15 milliseconds to see the dimming effect    
  delay(15); 

// turns on the other LEDs every four times through the fade by 
// checking the modulo of the counter.
// the modulo function gives you the remainder of 
// the division of two numbers:
  if (counter % 4 == 0) {
    digitalWrite(2, HIGH);
  } else {
   digitalWrite(2, LOW);
  }  
}

# SPDX-FileCopyrightText: 2018 Mikey Sklar for Adafruit Industries
#
# SPDX-License-Identifier: MIT

import time

import board
import pwmio
from digitalio import DigitalInOut, Direction

# PWM (fading) LEDs are connected on D0 (PWM not avail on D1)
pwm_leds = board.D0
pwm = pwmio.PWMOut(pwm_leds, frequency=1000, duty_cycle=0)

# digital LEDs connected on D2
digital_leds = DigitalInOut(board.D2)
digital_leds.direction = Direction.OUTPUT
brightness = 0  # how bright the LED is
fade_amount = 1285  # 2% steping of 2^16
counter = 0  # counter to keep track of cycles

while True:

    # And send to LED as PWM level
    pwm.duty_cycle = brightness

    # change the brightness for next time through the loop:
    brightness = brightness + fade_amount

    print(brightness)

    # reverse the direction of the fading at the ends of the fade:
    if brightness <= 0:
        fade_amount = -fade_amount
        counter += 1
    elif brightness >= 65535:
        fade_amount = -fade_amount
        counter += 1

    # wait for 15 ms to see the dimming effect
    time.sleep(.015)

    # turns on the other LEDs every four times through the fade by
    # checking the modulo of the counter.
    # the modulo function gives you the remainder of
    # the division of two numbers:
    if counter % 4 == 0:
        digital_leds.value = True
    else:
        digital_leds.value = False

# SPDX-FileCopyrightText: 2018 Mikey Sklar for Adafruit Industries
#
# SPDX-License-Identifier: MIT

import time

import board
import pwmio
from digitalio import DigitalInOut, Direction

# PWM (fading) LEDs are connected on D0 (PWM not avail on D1)
pwm_leds = board.D0
pwm = pwmio.PWMOut(pwm_leds, frequency=1000, duty_cycle=0)

# digital LEDs connected on D2
digital_leds = DigitalInOut(board.D2)
digital_leds.direction = Direction.OUTPUT
brightness = 0  # how bright the LED is
fade_amount = 1285  # 2% steping of 2^16
counter = 0  # counter to keep track of cycles

while True:

    # And send to LED as PWM level
    pwm.duty_cycle = brightness

    # change the brightness for next time through the loop:
    brightness = brightness + fade_amount

    print(brightness)

    # reverse the direction of the fading at the ends of the fade:
    if brightness <= 0:
        fade_amount = -fade_amount
        counter += 1
    elif brightness >= 65535:
        fade_amount = -fade_amount
        counter += 1

    # wait for 15 ms to see the dimming effect
    time.sleep(.015)

    # turns on the other LEDs every four times through the fade by
    # checking the modulo of the counter.
    # the modulo function gives you the remainder of
    # the division of two numbers:
    if counter % 4 == 0:
        digital_leds.value = True
    else:
        digital_leds.value = False