int pushButton = 3;
int ledPinRed = 2;
int buttonState = 0;
int ledPinYellow = 5;
int ledPinGreen = 7;

void setup() {
  Serial.begin(9600);
}

void loop(){
  // put your setup code here, to run once:
  Serial.println("Press button to start");  
  buttonState = digitalRead(pushButton);
 
  if (buttonState == 1) {
    Serial.println("Would you like Christmas lights?");
    while (Serial.available() == 0) {}  
    String ans = Serial.readString();
    Serial.println(ans);
      if (ans.indexOf("Y") >= 0) {
        Serial.println("You are here");
        digitalWrite(ledPinRed, HIGH);
        delay(500);
        digitalWrite(ledPinRed, LOW);

        digitalWrite(ledPinYellow, HIGH);
        delay(500);
        digitalWrite(ledPinYellow, LOW);

        digitalWrite(ledPinGreen, HIGH);
        delay(500);
        digitalWrite(ledPinGreen, LOW);
        digitalWrite(ledPinRed, HIGH);
        delay(500);
        digitalWrite(ledPinRed, LOW);

        digitalWrite(ledPinYellow, HIGH);
        delay(500);
        digitalWrite(ledPinYellow, LOW);

        digitalWrite(ledPinGreen, HIGH);
        delay(500);
        digitalWrite(ledPinGreen, LOW);
        digitalWrite(ledPinRed, HIGH);
        delay(500);
        digitalWrite(ledPinRed, LOW);

        digitalWrite(ledPinYellow, HIGH);
        delay(500);
        digitalWrite(ledPinYellow, LOW);

        digitalWrite(ledPinGreen, HIGH);
        delay(500);
        digitalWrite(ledPinGreen, LOW);
        digitalWrite(ledPinRed, HIGH);
        delay(500);
        digitalWrite(ledPinRed, LOW);

        digitalWrite(ledPinYellow, HIGH);
        delay(500);
        digitalWrite(ledPinYellow, LOW);

        digitalWrite(ledPinGreen, HIGH);
        delay(500);
        digitalWrite(ledPinGreen, LOW);
        digitalWrite(ledPinRed, HIGH);
        delay(500);
        digitalWrite(ledPinRed, LOW);

        digitalWrite(ledPinYellow, HIGH);
        delay(500);
        digitalWrite(ledPinYellow, LOW);

        digitalWrite(ledPinGreen, HIGH);
        delay(500);
        digitalWrite(ledPinGreen, LOW);
    }
    if (Serial.readString() == "No") {
      Serial.println("Ok, bye");
    }
    buttonState = 0;
  }
}