void setup() {
  pinMode(2, INPUT);
    pinMode(6, INPUT_PULLUP);
  pinMode(4, OUTPUT);
  Serial.begin(9600);       // initialize serial
}
// If not using PULLUP, then default state will be HIGH and you
// need to dampen it before sending signal to PIN using a 
// 10k resistor, so pressing the button results in LOW state
void loop() {
 int buttonInput2 = digitalRead(2); // Read the state of pin 2
    //Serial.println("BUTTON:" + buttonInput); // Print the value to the Serial Monitor

    if (buttonInput2 == LOW) {
        digitalWrite(4, HIGH); // Turn off the LED
         delay(100); // Simple delay for debouncing and readability
        Serial.println("1OFF"); // Print the value to the Serial Monitor
    } else {
        digitalWrite(4, LOW); // Turn on the LED
         delay(100); // Simple delay for debouncing and readability
        Serial.println("1ON"); // Print the value to the Serial Monitor
    }

// If using PULLUP, you are using internal voltage to power the signal 
// and bring it up to a HIGH value, so pressing button connects you to ground 
// resulting in a LOW state
    int buttonInput6 = digitalRead(6); // Read the state of pin 6
    //Serial.println("BUTTON:" + buttonInput); // Print the value to the Serial Monitor

    if (buttonInput6 == LOW) {
        digitalWrite(4, LOW); // Turn on the LED
         delay(100); // Simple delay for debouncing and readability
                Serial.println("2ON"); // Print the value to the Serial Monitor
    } else {
          digitalWrite(4, HIGH); // Turn off the LED
          delay(100); // Simple delay for debouncing and readability
          Serial.println("2OFF"); // Print the value to the Serial Monitor
          
    }

}

// Serial.println(buttonState == HIGH ? "Button Pressed" : "Button Released");