#include <Servo.h>

Servo elevation_servo;

//================================================

void setup() {
  // put your setup code here, to run once:
  pinMode(7, OUTPUT);

  elevation_servo.attach(3);

}

//================================================

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(7, HIGH);
  delay(500);
  digitalWrite(7,LOW);
  delay(500);

  elevation_servo.write(180);
  delay(500);
  elevation_servo.write(0);
  delay(500);

}