int s1 = 12;
int s2 = 6;
int s3 = 7;

int s1v ;
int s2v ;
int s3v ;

int l1 = 13;
int l2 = 11;
int l3 = 10;
int l4 = 9 ;

void setup() {
 Serial.begin(9600);
 pinMode(s1v,INPUT);
 pinMode(s2v,INPUT);
 pinMode(s3v,INPUT);

 pinMode(l1, OUTPUT);
 pinMode(l2, OUTPUT);
 pinMode(l3, OUTPUT);
 pinMode(l4, OUTPUT);

}

void loop() {
 s1v = digitalRead(s1);
 s2v = digitalRead(s2);
 s3v = digitalRead(s3);

 Serial.print(s1v);
 Serial.print(s2v);
 Serial.println(s3v);

if(s1v==1){
  digitalWrite(l1,1);
  digitalWrite(l2,1);
  digitalWrite(l3,0);
  digitalWrite(l4,0);
} 

if(s2v==1){
  digitalWrite(l1,0);
  digitalWrite(l2,0);
  digitalWrite(l3,1);
  digitalWrite(l4,1);
} 

if(s3v==1){
  digitalWrite(l1,0);
  digitalWrite(l2,0);
  digitalWrite(l3,0);
  digitalWrite(l4,0);
} 


}