// Make LED blink when button is pressed
// Make LED stop blinking when button is pressed again

const int LED = 13;
const int BUTTON = 7;
const int DELAY = 1000;
int val = 0;
int blinking = 0;

void setup() {
  // put your setup code here, to run once:
  pinMode(LED, OUTPUT);
  pinMode(BUTTON, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  val = digitalRead(BUTTON);

  if (val == HIGH)
  {
    if (blinking == 0)
    {
      blinking = 1;
    }
    else  // blinking == 1
    {
      blinking = 0;
      delay(DELAY);
    }
  }

    if (blinking == 1)
    {
      digitalWrite(LED, HIGH); // turns the LED on
      delay(DELAY);             // waits for a second
      digitalWrite(LED, LOW);  // turns the LED off
      delay(DELAY);
    }
    else
    {digitalWrite(LED, LOW);}
}