Yazılım | Programlama Arduino Kodlarımda Hata Var Mı?

const int trig1 = 10;
const int echo1 =  8;
const int trig3 = 12;
const int echo3 = 13;

const int sol_i = 2; 
const int sol_g = 3;
const int sag_i = 4;
const int sag_g = 5;

int  sure1 =  0;
int mesafe1 = 0;
int  sure3 =  0;
int mesafe3 = 0;

**** setup()

{
  pinMode(trig1 , OUTPUT);
  pinMode(echo1 , INPUT );
  pinMode(trig3 , OUTPUT);
  pinMode(echo3 , INPUT );


  pinMode(sol_i, OUTPUT);
  pinMode(sol_g, OUTPUT);
  pinMode(sag_i, OUTPUT);
  pinMode(sag_g, OUTPUT);
}

**** loop()

{
  digitalWrite(trig1 , HIGH); 
  delayMicroseconds(1000); 
  digitalWrite(trig1 ,  LOW); 

  sure1 = pulseIn(echo1 , HIGH);
  mesafe1 = (sure1 / 2) / 28.5;

    digitalWrite(trig3 , HIGH);
  delayMicroseconds(1000);  
  digitalWrite(trig3 ,  LOW); 

  sure3 = pulseIn(echo3 , HIGH);
  mesafe3 = (sure3 / 2) / 28.5;
 

 if (mesafe1 < 30 and mesafe3 > 30) {
    digitalWrite(sol_i ,  1);
    digitalWrite(sol_g ,  0);
    digitalWrite(sag_i ,  0);
    digitalWrite(sag_g ,  1);
}

 if (mesafe1 > 30 and mesafe3 < 30) {
    digitalWrite(sol_i ,  0);
    digitalWrite(sol_g ,  1);
    digitalWrite(sag_i ,  1);
    digitalWrite(sag_g ,  0);
 }
}