#include <Arduino.h>
#include <Servo.h>
Servo twisty;
const unsigned long eventInterval = 1000;
const unsigned long eventInterval2 = 2000;
unsigned long previousTime = 0;
void setup() {
//declaring all the LED as outputs
pinMode(5, OUTPUT); // yellow led - A
pinMode(6,OUTPUT); //green led - B
pinMode(9,OUTPUT); // red led - C
pinMode(10,OUTPUT); //blue led - D
//declaring all the buttons as inputs
pinMode(2,INPUT); //yellow button - button A
pinMode(12,INPUT); //green button - button B
pinMode(8,INPUT); //red button - button C
pinMode(7,INPUT); // blue button - button D
twisty.attach(11);
Serial.begin(9600);
}
void blinker (int ledpin){
  for (int i = 0; i<2; i++){
    digitalWrite(ledpin, LOW);
    delay(550);
    digitalWrite(ledpin,HIGH);
    delay(550);
  }
}

void loop() {
  unsigned long currentTime = millis();
  digitalWrite(5, HIGH);
  digitalWrite(6, HIGH);
  digitalWrite(9, HIGH);
  digitalWrite(10, HIGH);
  twisty.write(90);
  if (currentTime - previousTime >= eventInterval){
  digitalWrite(5, LOW);
  blinker(5);
  digitalWrite(6, LOW);
  blinker(6);
  digitalWrite(9, LOW);
  blinker(9);
  digitalWrite(10, LOW);
  blinker(10);
  currentTime = previousTime;
}
   if (currentTime - previousTime >= eventInterval2){
    twisty.write(30);
    currentTime = previousTime;
}
}