Control a Servo with Arduino

#include <Servo.h>

Servo myservo;  // create servo object to control a servo
// twelve servo objects can be created on most boards

int pos = 0;    // variable to store the servo position

void setup() {
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object
}

void loop() {
  for (pos = 0; pos <= 180; pos += 1) { // goes from 0 degrees to 180 degrees
    // in steps of 1 degree
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(5);                       // waits 5ms for the servo to reach the position
  }
  for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(5);                       // waits 5ms for the servo to reach the position
  }
}

#include <Servo.h>

Servo myservo;  // create servo object to control a servo
int ldr = 0;  //analog pin to which LDR is connected
int ldr_value = 0; //variable to store LDR values
int take_photo = 100; // value when we want to take a photo when a light comes on
int pos = 0;    // variable to store the servo position



void setup() {
Serial.begin(9600); //start serial Monitor
myservo.attach(9);  // attaches the servo on pin 9 to the servo object
}

void loop() {

ldr_value = analogRead(ldr);
Serial.println(ldr_value); //prints photoresistor value
delay(100); // value updated every 0.1 second.

if (ldr_value < take_photo) // if sensor value is less than 100 it will turn the servo on.
   {
    //take photo

    for (pos = 0; pos <= 180; pos += 1) { // goes from 0 degrees to 180 degrees
        // in steps of 1 degree
        myservo.write(pos);              // tell servo to go to position in variable 'pos'
        delay(5);                       // waits 5ms for the servo to reach the position
      }
      for (pos = 180; pos >= 0; pos -= 1) { // goes from 180 degrees to 0 degrees
        myservo.write(pos);              // tell servo to go to position in variable 'pos'
        delay(5);                       // waits 5ms for the servo to reach the position
      }
      delay (10000);  //wait 10 seconds before checking again

    }
   else
   {
    Serial.println(ldr_value);
   }
}