#define PIN_1 12
#define PIN_2 11
#define PIN_3 10
#define BUTTON_PIN 4

int arr[3] = {PIN_1, PIN_2, PIN_3};

void init_LED()
{
  for(int i=0; i< sizeof(arr) / sizeof(arr[0]); i++)
  {
    pinMode(arr[i], OUTPUT);
    //make sure all of the LEDS are first off
    digitalWrite(arr[i], 0);
  }
}

//function that causes lights to blink sequentially
void blinkLEDS()
{
  for(int i=0; i < sizeof(arr)/sizeof(arr[0]); i++)
  {
    //turn the current LED on
    digitalWrite(arr[i], 1);
    delay(100);
    digitalWrite(arr[i], 0);
  }
}

void stopBlink()
{

  for(int i=0; i < sizeof(arr)/sizeof(arr[0]); i++)
  {
    
    //if user presses the button, leave the current LED on
    while(digitalRead(BUTTON_PIN) == 1)
    {
      delay(10);
      digitalWrite(arr[i], 1);
    }
   
    //this happens when the button is not pressed
      //turn the current LED on
      digitalWrite(arr[i], 1);
      delay(200);
      digitalWrite(arr[i], 0);
  }
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  //init the output button
  pinMode(BUTTON_PIN, INPUT);


  //initialiaze all of the LED pins
  init_LED();
    
}

void loop() {
  // put your main code here, to run repeatedly:

  stopBlink();


  
  

}