int led1 = 13;
int led2 = 12;
int led3 = 11;
int led4 = 10;

const byte interruptPin = 2;
volatile byte state = LOW;

const int  button = 8;    // the pin that the pushbutton is attached to
int buttonPushCounter = 0;   // counter for the number of button presses
int ButtonState = 1;         // current state of the button
int lastState = 1;           // previous state of the button



void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(button, INPUT_PULLUP);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  pinMode(interruptPin, INPUT_PULLUP);
  attachInterrupt(digitalPinToInterrupt(interruptPin), blink, FALLING);
}

// the loop function runs over and over again forever
void loop() {
  ButtonState = digitalRead(button);
  if (ButtonState && ButtonState != lastState) // button latch, no debounce needed.
  on();
  lastState = ButtonState;
 // delay(2000);
 // off();
}

void on(void){
  digitalWrite(led1, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(led2, HIGH);    // turn the LED off by making the voltage LOW
  delay(1000);             
  digitalWrite(led3, HIGH);
   delay(1000);             
  digitalWrite(led4, HIGH);
  delay(2000);
  off();
}

void blink() {
  //state = !state;
 // digitalWrite(led1, LOW);
//  digitalWrite(led3, LOW);
  //off();
  digitalWrite(led2, HIGH);
  digitalWrite(led4, HIGH);
digitalWrite(led1, HIGH);
digitalWrite(led3, HIGH);

}
void off(void){
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
}