#include <Servo.h>
Servo lr_servo;//define the name of the servo rotating right and
left
int lr_angle = 90;//set the initial angle to 90 degreeset the initial
angle to 90 degree
const byte lr_servopin = 9;//define the name of the servo
rotating upwards and downwards and its control pin
void setup() {
lr_servo.attach(lr_servopin); // set the control pin of the servo
lr_servo.write(lr_angle);//return to initial angle
delay(1000);
}