#include <Servo.h> 

Servo myservo; // create servo object to control a servo 

// a maximum of eight servo objects can be created 

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(15); // waits 15ms for the servo to reach the position 

} 

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

{ 

myservo.write(pos); // tell servo to go to position in variable 'pos' 

delay(15); // waits 15ms for the servo to reach the position 

} 

myservo.write(90); // tell servo where to go

delay(250); // waits 250ms for the servo to reach the position 

delay(3000); //remain at 90 degrees for 3 seconds

myservo.write(180); // tell servo where to go

delay(250); // waits 250ms for the servo to reach the position 

delay(3000); //remain at 180 degrees for 3 seconds

myservo.write(0); // tell servo where to go

delay(250); // waits 250ms for the servo to reach the position 

delay(3000); //remain at 180 degrees for 3 seconds

/*

NOTICE THAT WE BRING THE SERVO BACK TO THE POSITION WHERE THE NEXT FOR LOOP STARTS TO

AVOID JERKY MOTION

*/

}