#include <Servo.h>
Servo Servomotor ;
int angle=0 ;
void setup() {
  Servometer.attach(9) ;

  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:
for(angle=0; angle<=180;angle++){
  delay(1000) ;
}


for (angle=180; angle>=0; angle --){
  Servomotor.write.(angle);
  delay(1000) ;  
}