Light Fearing Robot code

#include <Servo.h>

Servo rutter;
int photocellPin1 = 1;
int photocellPin3 = 3;

String highest;
int p1;
int p3;
int pos;

void setup(void) {
  Serial.begin(9600);
  rutter.attach(9);  
  delay(500);
     zero();
     delay(1000);
}
 
void loop(void) {
  p1 = analogRead(photocellPin1);
  p3 = analogRead(photocellPin3)-37;  //-37 being the offset to equalize the two photoresitors
 
 //debug info
  Serial.print("Analog 1 = ");
  Serial.println(p1);     // the raw analog reading
  Serial.print("Analog 3 = ");
  Serial.println(p3);     // the raw analog reading
  Serial.print("Highest = ");
  Serial.println(highest);

  //control
  if(p1>p3){
    turnRight();
  } else{
    turnLeft();
  }
   
  delay(1500);
}

void turnRight(){
  rutter.write(180);
}

void turnLeft(){
  rutter.write(120);
}

void zero(){
  rutter.write(145);
}