const int sw1 = 25;
const int sw2 = 26;
const int sw3 = 27;


const int led1 = 23;
const int led2 = 22;
const int led3 = 21;
const int led4 = 19;

void setup ()
{
  Serial.begin(9600);
  pinMode(sw1,INPUT);
  pinMode(sw2, INPUT);
  pinMode(sw3, INPUT);
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
}

void loop()
{
  int estado_sw1 = digitalRead(sw1);
  int estado_sw2 = digitalRead(sw2);
  int estado_sw3 = digitalRead(sw3);

 if(estado_sw1 == HIGH)
  {
  digitalWrite(led1, HIGH); 
  delay(1000);
  digitalWrite(led2, HIGH);
  delay(1000); 
  
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  }
  else if(estado_sw2 == HIGH)
  {
  digitalWrite(led4, HIGH); 
  delay(2000);
  
  digitalWrite(led4, LOW);
  }
   else if(estado_sw3 == HIGH)
  {
  digitalWrite(led1, HIGH); 
  digitalWrite(led2, HIGH); 
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH); 
  delay(1000);
  digitalWrite(led1, LOW); 
  digitalWrite(led2, LOW); 
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW); 

  }
  else 
  {
   digitalWrite(led1, LOW); 
   digitalWrite(led2, LOW); 
   digitalWrite(led3, LOW);
   digitalWrite(led4, LOW); 
  }
  delay(200);
}