void setup() 
{
pinMode(2,OUTPUT);
pinMode(3,OUTPUT);
pinMode(4,OUTPUT);
pinMode(5,INPUT);
pinMode(6,INPUT);
pinMode(7,INPUT);
}
void loop() 
{
  if (digitalRead(5) == HIGH)
  {
  digitalWrite(2,HIGH); 
  delay(500);
  digitalWrite(2,LOW); 
  delay(500);
  }
  else digitalWrite(2,LOW);

  if (digitalRead(7) == HIGH || digitalRead(6) == HIGH ) 
  {
  digitalWrite(4,HIGH); 
  digitalWrite(3,HIGH);
  }
  else 
  {
  digitalWrite(4, LOW);
  digitalWrite(3,LOW);
  }
}