nclude <Servo.h> // You might want this. 
 
Servo scanservo;
Servo pointservo;
 
int pos = 0;    // variable to store the servo position 
int maxdeg = 180; // In the for loops below, this is the value that the servo trys to approach, this is the highest value
int mindeg = 0; // Same as above, but it's the minimum value. 
int idelay = 5; //This is how long the servo has to write it's location
int highnumber = 10000; //a random high number that is greater than any value the photocell can generate
int highpoint; //an arbitrary declaration 

void setup() 
{ 
  pinMode(0, INPUT);
  Serial.begin(9600);
  scanservo.attach(9);  // a servo's pwm wire @ 9
  pointservo.attach(10); // a servo's pwm wire @ 10
} 
 
 
void loop(){
  
  sweep(); // i'm running this inside a function because I've got other plans for it later. 
  
} 

int sweep(){
   
 highnumber = 0; //sets the mumber the sensor has to be greater than to an even smaller number!
  
 for(pos = mindeg; pos < maxdeg; pos += 1){ //right to left                               
 
 Serial.print("The sensor reads : ");
 Serial.print(analogRead(0));
    
  if (analogRead(0) > highnumber){
    highnumber = analogRead(0);
    highpoint = pos;
    Serial.print(" The new highest value is : ");
    Serial.print(highnumber);
    Serial.print(" : At the position : ");
    Serial.println(highpoint);
  }
  else if (analogRead(0) <= highnumber){
    Serial.print(" : The old highest value is : ");
    Serial.print(highnumber);
    Serial.print(" : At the position : ");
    Serial.println(highpoint);
  }
   
    scanservo.write(pos);
    delay(idelay);

 } 
 
 for(pos = maxdeg; pos>=1; pos-=1){ //left to right                                
    
 Serial.print("The sensor reads : ");
 Serial.print(analogRead(0));
    
  if (analogRead(0) > highnumber){
    highnumber = analogRead(0);
    highpoint = pos;
    Serial.print(" The new highest value is : ");
    Serial.print(highnumber);
    Serial.print(" : At the position : ");
    Serial.print(highpoint);
  }
    else if (analogRead(0) <= highnumber){
    Serial.print(" : The old highest value is : ");
    Serial.print(highnumber);
    Serial.print(" : At the position : ");
    Serial.println(highpoint);
  }
    
    scanservo.write(pos);     
    delay(idelay);
  }
 
   pointservo.write(highpoint); //writes to the servo where the photocell saw the most resistance, thus the brightest point. 

}