#include <Servo.h>
Servo svrmotor;
int angle=0;
int angle_2=180;
void setup() {
  // put your setup code here, to run once:
svrmotor.attach(9);
}

void loop() {
  // put your main code here, to run repeatedly:
  
while (angle<180){
svrmotor.write(angle);
delay(200); 
angle+=15;
 
}
angle=0;

 while (angle_2>0){
svrmotor.write(angle_2);
delay(200);
angle_2-=15;

}
angle_2=180;
}