const int  button = 3;    
const int led1 = 7;       

int buttonPushCounter = 0;   
int buttonState = 0;         
int lastButtonState = 0;     

void setup() {
  
pinMode(led1,OUTPUT);
pinMode(button,INPUT);
}

void loop() {
    buttonState = digitalRead(button);

  if (buttonState != lastButtonState) {
    if (buttonState == HIGH) {
     buttonPushCounter++;
    } 
    else {
    }
  }
  lastButtonState = buttonState;
  
  if (buttonPushCounter % 4 == 0) {
    digitalWrite(led1, HIGH);
  } else {
   digitalWrite(led1, LOW);
  }
}