#include <Servo.h>

Servo servo_4;
int buttonPin = 7;
int buttonState = 0;
int ledPin = 6;

void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
servo_4.attach(5, 500, 2500);
pinMode(7, INPUT);
pinMode(6, OUTPUT);
servo_4.attach(4);
}

void loop() {
  // put your main code here, to run repeatedly:
buttonState = digitalRead(buttonPin);
 if (buttonState == HIGH){
   servo_4.write(90);
   delay(100);
digitalWrite(ledPin, HIGH);
delay(100);
 }
 else {
   servo_4.write(0);
   delay(100);
digitalWrite(ledPin, LOW);
delay(100);
 }
}