#include <Servo.h>

Servo servo;
void setup() {
  // put your setup code here, to run once:
  servo.attach(6);
}

void loop() {
  // put your main code here, to run repeatedly:
  servo.write(90); //Arah awal servo
  delay(500); 
  servo.write(0);
  delay(500);
  servo.write(90);
  delay(500);
  servo.write(180);
  delay(500);
}