#include <Servo.h>
Servo myservo;

void setup() {
  myservo.attach(3);
  pinMode(2, INPUT);
  pinMode(4, OUTPUT);
}

void loop() {

  if(digitalRead(2)==1) {
     myservo.write(0);
     digitalWrite(4,LOW);
  delay(1000);

  }
  if(digitalRead(2)==0) {
    digitalWrite(4,HIGH);
     myservo.write(180);
  
  }
}