Arduino Solar tracker

solartracker.c

int LDR1 = A0;  
int LDR2 = A1;  
int LDR3 = A2;  
int LDR4 = A3;  
int pos = 30; 
int a=0;



int motorPin1 = 8;
int motorPin2 = 9;
int motorPin3 = 10;
int motorPin4 = 11;
int delayTime = 10;

#include <Servo.h> 

Servo myservo; 

int top=0;
int down=0;
int right=0;
int left=0;


void setup(){
   Serial.begin(9600);
   myservo.attach(14);
   pinMode(motorPin1, OUTPUT);
   pinMode(motorPin2, OUTPUT);
   pinMode(motorPin3, OUTPUT);
   pinMode(motorPin4, OUTPUT);
}

void  clockwise()
{
    a=a--;
  Serial.println(a);
digitalWrite(motorPin1, HIGH);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin4, LOW);
delay(delayTime);
digitalWrite(motorPin1, LOW);
digitalWrite(motorPin2, HIGH);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin4, LOW);
delay(delayTime);
digitalWrite(motorPin1, LOW);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin3, HIGH);
digitalWrite(motorPin4, LOW);
delay(delayTime);
digitalWrite(motorPin1, LOW);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin4, HIGH);
delay(delayTime);
}

void counterClockwise(){
  a=a++;
 Serial.println(a);
digitalWrite(motorPin1, LOW);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin4, HIGH);
delay(delayTime);
digitalWrite(motorPin1, LOW);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin3, HIGH);
digitalWrite(motorPin4, LOW);
delay(delayTime);
digitalWrite(motorPin1, LOW);
digitalWrite(motorPin2, HIGH);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin4, LOW);
delay(delayTime);
digitalWrite(motorPin1, HIGH);
digitalWrite(motorPin2, LOW);
digitalWrite(motorPin3, LOW);
digitalWrite(motorPin4, LOW);
delay(delayTime);

}




void loop()
{
   
  int LDRReading1 = analogRead(LDR1); 
  int LDRReading2= analogRead(LDR2); 
  int LDRReading3= analogRead(LDR3);
  int LDRReading4= analogRead(LDR4);
 
 
    left=(LDRReading1+LDRReading3)/2;
    right=(LDRReading2+LDRReading4)/2;
  
    top=(LDRReading1+LDRReading2)/2;
    down=(LDRReading3+LDRReading4)/2;
  
   if (top>down){
     
     myservo.write(pos);
     pos=--pos;
    delay(5);
   }
   
    else if(down>top)
  {
   myservo.write(pos);
   pos=++pos;
    delay(5);
    }  
    
    
    if(pos>180){
      pos=180;
    }
    if(pos<30){
      pos=30;
    }
    
    if(right>left){
      clockwise();
    }
    if(left>right)
    {
    counterClockwise();
    }
    
    
   
  //Serial.print("--right==");
 // Serial.print(right);
 // Serial.print("--left==");
  //Serial.println(left);
  

   
  delay(30); 
}