// This example code is in the public domain.


#include <Servo.h> 

Servo myservo;  // create servo object to control a servo 
// a maximum of eight servo objects can be created 

int pos = 90;   // variable to store the servo position 

void setup() 
{ 
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object 
  myservo.write(0); 
} 


void loop() 
{  

  delay(100);
  for(pos =90; pos>=1;pos-=1)     // goes from 180 degrees to 0 degrees 1

  {                                  // in steps of 1 degree 
    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(5);                       // waits 15ms for the servo to reach the position 
  } 
  //
  delay (100);

  for(pos = 0; pos <90;pos += 1)  // goes from 0 degrees to 180 degrees 
  {                                
    myservo.write(pos);              // tell servo to go to position in variable 'pos' 
    delay(5);                       // waits 15ms for the servo to reach the position 
  } 
  myservo.write(90);
  delay(1500);

}