#include <Servo.h>
//declaring myservo in the scope
Servo myservo;
void setup() {
myservo.attach(5);
}
void loop() {
/*myservo.write(0);
delay(10);
myservo.write(45);
delay(10);
myservo.write(90);
delay(10);
myservo.write(180);
delay(10);
*/
for (int i=0;i<=180;i++){
  myservo.write(i);
  delay(1);
}
for (int i=180;i>=0;i--){
  myservo.write(i);
  delay(1);
}
}