int press;

void setup() {
  // put your setup code here, to run once:
pinMode(13, INPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
int button=digitalRead(13);
if(button==1){
  press++;
  delay(300);
  if(press==1){
    digitalWrite(7, HIGH);
  }
  else if (press==2){
    digitalWrite(6, HIGH);
  }
  else if (press==3){
    digitalWrite(5, HIGH);
  }
  else if (press==4){
    digitalWrite(4, HIGH);
  }
  else if (press==5){
    digitalWrite(7, LOW);
    digitalWrite(6, LOW);
    digitalWrite(5, LOW);
    digitalWrite(4, LOW);
    press=0;
  }
}
}