Script for either a Latched button press or a Momentary on Button press

//Momentary on button switch or Latched button switch Demo
//IF IN "LATCHED BUTTON MODE", WILL BLINK "Blink()" THE LED IF LATCHED BUTTON IS HELD DOWN kept "LOW" blinkLedPeriod = 300;
//DECLARATIONS


//CONSTANTS
const byte Button_1 = 4; //pin 4
const byte blinkLedPin = 13;

//INT
int buttonState = HIGH; //this variable tracks the state of the button, low if not pressed, high if pressed
//MOST IMPORTANT HERE
int ledState = -1; //this variable tracks the state of the LED, negative if off, positive if on
int blinkLedPeriod = 300;

//LONG
long lastDebounceTime = 0; // the last time the output pin was toggled
long debounceDelay = 50; // the debounce time; increase if the output flickers

//UNSIGNED LONG
unsigned long currentTime;
unsigned long blinkLedStartTime;



//setup
void setup()
{
  Serial.begin(115200);

  //PINMODE
  pinMode( Button_1, INPUT_PULLUP);
  pinMode(blinkLedPin, OUTPUT);

  Serial.println(ledState);
}

void loop()
{
  currentTime = millis();
  button_1_press();

}//loop

void button_1_press()
{
  //sample the state of the button - is it pressed or not?
  buttonState = digitalRead( Button_1);


  //filter out any noise by setting a time buffer
  if ( (millis() - lastDebounceTime) > debounceDelay)
  {
    //if the button has been pressed, lets toggle the LED from "off to on" or "on to off"
    if ( (buttonState == LOW) && (ledState < 0)    )
    {
      Blink(); //call the Blink() function
      Serial.println("buttonState == LOW");
      Serial.println(ledState);

      ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////      //BEGIN: MOMENTARY ON BUTTON OPTION      ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

      //to make a "Momentary on Button Switch", "uncomment" the two lines below, digitalWrite(blinkLedPin, HIGH); and ledState = -ledState; below else it's a Latched switch

      //digitalWrite(blinkLedPin, HIGH); //turn an LED on /////////////////////////////////////
      //ledState = - ledState; //now the LED is on, we need to change the state


      lastDebounceTime = millis(); //set the current time
    }
    else if ( (buttonState == HIGH) && (ledState > 0) )
    {


      Serial.println("buttonState == HIGH");
      Serial.println(ledState);

      //to make a "Momentary on Button Switch", "uncomment" the two lines below, digitalWrite(blinkLedPin, LOW); and ledState = -ledState; below else it's a Latched switch

      //digitalWrite(blinkLedPin, LOW); //turn an LED off
      //ledState = - ledState; //now the LED is off, we need to change the state

      ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
//END: MOMENTARY ON BUTTON OPTION      ////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


      lastDebounceTime = millis(); //set the current time

    }//if button state

  }//millis

}//button_1_presS


void Blink() //function
{
  //let's start with the single blinking LED
  if (currentTime - blinkLedStartTime >= blinkLedPeriod) //time to change the single LED state
  {
    digitalWrite(blinkLedPin, !digitalRead(blinkLedPin));
    blinkLedStartTime = currentTime;
    Serial.println(F("\tBLINK"));
  }
}//BLINK