#include <Servo.h>              //Servo library
 
Servo myservo;        //initialize a servo object for the connected servo  
                
int angle = 0;    
 
void setup() 
{ 
  
  myservo.attach(10);      // attach the signal pin of servo to pin9 of arduino
} 
  
void loop() 
{ 
  for(angle = 0; angle < 180; angle += 1)    // command to move from 0 degrees to 180 degrees 
  {                                  
    myservo.write(angle);                 //command to rotate the servo to the specified angle
    delay(5);                       
  } 
 
  
  for(angle =180; angle>=1; angle-=1)     // command to move from 180 degrees to 0 degrees 
  {                                
    myservo.write(angle);              //command to rotate the servo to the specified angle
    delay(5);                       
  } 
  
}