byte val, task;
bool flag = false;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(2, INPUT_PULLUP);

  for (int i = 3; i <= 10; i++) {
    pinMode(i, OUTPUT);
    delay(10);
    Serial.println(i);
  }
  attachInterrupt(digitalPinToInterrupt(2), count, CHANGE);
}

void loop() {
  // put your main code here, to run repeatedly:
  switch (task) {
    case 0:
      pushButton();
      break;

    case 1:
      for (int i = 3; i <= 10; i++) {
        digitalWrite(i, HIGH);
        delay(10);
      }
      pushButton();
      break;

    case 2:
      pushButton();
      for (int i = 3; i <= 10; i++) {
        digitalWrite(i, LOW);
        delay(10);
      }

      for (int i = 3; i <= 10; i++) {
        digitalWrite(i, HIGH);
        delay(1000);
      }
      break;

    case 3:
    pushButton();
      for (int i = 3; i <= 10; i++) {
        digitalWrite(i, LOW);
        delay(10);
      }

      for (int i = 10; i >= 3; i--) {
        digitalWrite(i, HIGH);
        delay(1000);
      }
      break;

    case 4:
      for (int i = 3; i <= 10; i++) {
        digitalWrite(i, LOW);
        delay(10);
      }
      break;
  }
}

void pushButton() {
  if (val == 1) {
    task = 1;
    delay(10);
  }
  if (val == 2) {
    task = 2;
    delay(10);
  }
  if (val == 3) {
    task = 3;
    delay(10);
  }
  if (val == 4) {
    task = 4;
    if(digitalRead(2) == LOW){
      val = 2;
    }
    delay(10);
  }
}

void count(){
  pushButton();
  if (digitalRead(2) == LOW && flag == false) {
    val += 1;
    flag = true;
    delay(500);
    Serial.println("Value Button: " + String(val));
  }
  else{
    flag = false;
    delay(250);
  }
}