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

int readX() // returns the value of the touch screen's X-axis
	{
		int xr = 0;
		pinMode(14, INPUT);   // A0
		pinMode(15, OUTPUT);    // A1
		pinMode(16, INPUT);   // A2
		pinMode(17, OUTPUT);   // A3
		digitalWrite(15, LOW); // set A1 to GND
		digitalWrite(17, HIGH);  // set A3 as 5V
		delay(5); // short delay is required to give the analog pins time to adjust to their new roles
		xr = analogRead(0);
		return xr;
	}

	int readY() // returns the value of the touch screen's Y-axis
	{
		int yr = 0;
		pinMode(14, OUTPUT);   // A0
		pinMode(15, INPUT);    // A1
		pinMode(16, OUTPUT);   // A2
		pinMode(17, INPUT);   // A3
		digitalWrite(14, LOW); // set A0 to GND
		digitalWrite(16, HIGH);  // set A2 as 5V
		delay(5); // short delay is required to give the analog pins time to adjust to their new roles
		yr = analogRead(1);
		return yr;
	}

long first = 0;
long second = 0;
int times = 0;
int zoneSelected = 0;
long timeNoFinger = 0;
int index = 0;
 void detectCollisionWithScreen()
	{       x = readX();
		y = readY();

		if (y > 510 && x > 520 && x < 800 && y <800)
		{
			 zoneSelected = 1;
                        first = millis();
		}
		else
		if (y>510 && x < 510)
		{
			 zoneSelected = 2;
                        first = millis();
		}
		else
		if (y<500 && x>520)
		{
			 zoneSelected = 3;
                        first = millis();
		}
		else
		if (y<500 && x<510)
		{
			 zoneSelected = 4;
                        first = millis();
		}
		else
		if (x>800 && y>800)
		{
			  //this will be called each time a finger is lifted
                        second = millis();
                        if(second - first < 300) {
                        //possible double tap
                        times++;
                        second = millis();
                        first = second;
                        } else {
                        times = 0;
                        second = millis();
                        first = second;
                        }

                        if(times%2 == 0) {Serial.println(String(zoneSelected)); times = 0; }
		}
	}


void loop()
{
    detectCollisionWithScreen();

}