#include <Servo.h>

Servo myServo;
const int green = 13; 
const int blue = 10; 
const int yellow = 7;

void setup() {
  myServo.attach(3); 
  pinMode(green, OUTPUT);
  pinMode(blue, OUTPUT);
  pinMode(yellow, OUTPUT); 
}

void loop() {
 // gerakin servo
   myServo.write(0);
  digitalWrite(green, LOW); 
  digitalWrite(blue, LOW); 
  digitalWrite(yellow, LOW); 
  delay(1000); 

  myServo.write(45);
  digitalWrite(green, HIGH); 
  digitalWrite(blue, LOW); 
  digitalWrite(yellow, LOW); 
  delay(1000); 

  myServo.write(90);
  digitalWrite(green, HIGH); 
  digitalWrite(blue, HIGH); 
  digitalWrite(yellow, LOW);
  delay(1000); 

  myServo.write(180);
  digitalWrite(green, HIGH);
  digitalWrite(blue, HIGH); 
  digitalWrite(yellow, HIGH); 
  delay(1000); 
}