void setup() {  
  pinMode(13,OUTPUT);
  pinMode(12,OUTPUT);  
  pinMode(14,OUTPUT);
  pinMode(19,INPUT);   
  pinMode(18,INPUT_PULLDOWN); 
  pinMode(5,INPUT_PULLUP); //log. inv.
  }
void loop() {
  int valor = digitalRead(19); //0-1  
  if(valor){ //valor==1
    digitalWrite(13,1);  
    }
  else{    
    digitalWrite(13,0);
  }  
  int valor2 = digitalRead(18); //0-1
  if(valor2){ //valor==1    
  digitalWrite(12,1);
  }  
  else{
    digitalWrite(12,0);
  }  
  int valor3 = digitalRead(5); //log inv
  if(valor3==0){ //valor==1    
  digitalWrite(14,1);
  }  
  else{
    digitalWrite(14,0);  
    }
}