const int buttonPin = 0;     // the number of the pushbutton pin
const int ledPin1 =  1;      // the number of the LED pin
const int ledPin2 =  2;      // the number of the LED pin
const int ledPin3 =  3;      // the number of the LED pin

// variables will change:
int buttonState = 0;         // variable for reading the pushbutton status
int buttonCount =  0;

// int delay_interval = 0;

void setup() {
Serial.begin(115200);
// initialize the LED pin as an output:
pinMode(ledPin1, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(ledPin2, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(ledPin3, OUTPUT);
// initialize the pushbutton pin as an input:
pinMode(buttonPin, INPUT_PULLUP);
}

void loop() {
// read the state of the pushbutton value:
buttonState = digitalRead(buttonPin);
Serial.print("buttonState: ");
Serial.println(buttonState);
Serial.print("buttonCount: ");
Serial.println(buttonCount);

if (buttonState == LOW) {
  buttonCount+=  1;
  delay(3000);
  if (buttonCount > 3) {
    buttonCount = 0;
  }
}

if (buttonCount == 0) {
  digitalWrite(ledPin1, LOW);
  digitalWrite(ledPin2, LOW);
  digitalWrite(ledPin3, LOW);
} else if (buttonCount == 1) {
  digitalWrite(ledPin1, HIGH);
  delay(100);
  digitalWrite(ledPin1, LOW);
  delay(100);
} else if (buttonCount == 2) {
  digitalWrite(ledPin2, HIGH);
  delay(500);
  digitalWrite(ledPin2, LOW);
  delay(500);
} else if (buttonCount == 3) {
  digitalWrite(ledPin3, HIGH);
}

}