const int buttonPin = 4;
const int LedR = 7;
const int LedG = 6;
const int LedB = 5;

// Variables will change:
int buttonPushCounter = 0;   // counter for the number of button presses
int buttonState = 0;         // current state of the button
int lastButtonState = 0;     // previous state of the button

void setup() {
  // put your setup code here, to run once:

  pinMode( buttonPin, INPUT );
  pinMode( LedR, OUTPUT );
  pinMode( LedG, OUTPUT );
  pinMode( LedB, OUTPUT );
  Serial.begin(9600);
  Serial.println("BIANCO");
  digitalWrite(LedR, HIGH);
  digitalWrite(LedG, HIGH);
  digitalWrite(LedB, HIGH);
}

void loop() {

  buttonState = digitalRead(buttonPin);

  // compare the buttonState to its previous state
  if (buttonState != lastButtonState) {
    // if the state has changed, increment the counter
    if (buttonState == LOW) {
      // if the current state is HIGH then the button went from off to on:
      buttonPushCounter++;
      //Serial.println(buttonPushCounter);
      switch (buttonPushCounter)
      {
        case 1:
          Serial.println("BLU");
          digitalWrite(LedR, LOW);
          digitalWrite(LedG, LOW);
          digitalWrite(LedB, HIGH);
          break;
        case 2:
          Serial.println("VERDE");
          digitalWrite(LedR, LOW);
          digitalWrite(LedG, HIGH);
          digitalWrite(LedB, LOW);
          break;
        case 3:
          Serial.println("VIOLA");
          digitalWrite(LedR, HIGH);
          digitalWrite(LedG, LOW);
          digitalWrite(LedB, HIGH);
          break;
        case 4:
          Serial.println("ROSSO");
          digitalWrite(LedR, HIGH);
          digitalWrite(LedG, LOW);
          digitalWrite(LedB, LOW);
          break;
        default:
          Serial.println("BIANCO");
          digitalWrite(LedR, HIGH);
          digitalWrite(LedG, HIGH);
          digitalWrite(LedB, HIGH);
          buttonPushCounter = 0;
          break;
      }

    } else {
      // if the current state is LOW then the button went from on to off:

    }
    // Delay a little bit to avoid bouncing
    delay(150);

  }
  // save the current state as the last state, for next time through the loop
  lastButtonState = buttonState;


}