int count = 0;
void setup() {
  // put your setup code here, to run once:
pinMode(2,INPUT_PULLUP);
pinMode(3, OUTPUT);
pinMode(7, OUTPUT);
pinMode(5, OUTPUT);
pinMode(6, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  int val = digitalRead(2);
  if(val == 0){
    count = count +1;

  }
switch(count){
  case 1:
     digitalWrite(3, HIGH);
     break;
  case 2:
     digitalWrite;(4, HIGH);
     break;
  case 3:
     digitalWrite;(5, HIGH);
     break;
  case 4:
     digitalWrite(6, HIGH);
     break;
default:
digitalWrite(3, LOW);
digitalWrite(4, LOW);
digitalWrite(5, LOW);
digitalWrite(6, LOW);
count =0;
}
delay(300);
}