#include <Servo.h>
//#define servo_pin 3
//#define servo2_pin 5

Servo servo;
Servo servo2;

void setup() 
{
  // put your setup code here, to run once:
  servo.write(0);
  servo2.write(0);
  servo.attach(3);
  servo2.attach(5);

}

void loop() 
{
  delay(2000);
  servo.write(90);
  servo2.write(0);
  delay(2000);
  servo.write(0);
  servo2.write(90);
  delay(2000);
  servo.write(90);
  servo2.write(0);
}