#define buttonPin 7
#define ledPin 8

int pushbuttonState = 0;
int counter = 0;

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

void loop() {
  // put your main code here, to run repeatedly:
  pushbuttonState = digitalRead(buttonPin);
  if (pushbuttonState == LOW){
    counter++;
    for (int i=0; i<counter; i++){
      digitalWrite(ledPin, HIGH);
      delay(250);
      digitalWrite(ledPin, LOW);
      delay(250);
    }  
  }
}