/* blink assignment written by Matthew Borkowski on Septermber 17, 2019
 *  Fading code inspired from the Arduino Fading Example by David A. Mellis
 */

int ledPin = 9;

void setup() {
  // put your setup code here, to run once:
  pinMode(13, OUTPUT);
  pinMode(12, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(13, HIGH); //turns the LEDs on
  digitalWrite(12, HIGH);
  delay(350);             // pauses for 350 ms
  digitalWrite(13, LOW);
  delay(200);            // pauses for 200 ms
  digitalWrite(12, LOW);
  delay(350);

// fades in from a minimum of 0 to a maximum of 200 by incriments of 2 points:
  for (int fadeValue = 0; fadeValue <= 200; fadeValue += 2) {
    // sets the value (range from 0 to 200)
    analogWrite(ledPin, fadeValue);
    // wait for 20 milliseconds to see the dimming effect
    delay(20);
  }
  // fades from max of 200 to min of 0 by increments of 2 points
  for (int fadeValue = 200; fadeValue >= 0; fadeValue -= 2) {
    analogWrite(ledPin, fadeValue);
    // wait for 20 milliseconds to see the dimming effect
    delay(20);
  }
}