const int pb1 = 2;
const int pb2 = 3; 
const int l1 = 4;  
const int l2 = 5;  

void setup() {
  pinMode(pb1, INPUT_PULLUP);
  pinMode(pb2, INPUT_PULLUP); 
  pinMode(l1, OUTPUT);
  pinMode(l2, OUTPUT);
}

void loop() {

  if (digitalRead(pb1) == LOW) {
    digitalWrite(l1, HIGH);  
  } else {
    digitalWrite(l1, LOW);  
  }

  if (digitalRead(pb2) == LOW) {
    digitalWrite(l2, HIGH);  
    delay(200);             
    digitalWrite(l2, LOW);   
    delay(200);              
  } else {
    digitalWrite(l2, LOW);   
  }
}