void loop(){
    Point p = ts.getPoint();
    
    x = map(p.x, min_x, max_x, 0, 239);
    y = map(p.y, min_y, max_y, 0, 319);
    
    if(p.z > 10){
        Serial.print(x);
        Serial.print(':');
        Serial.println(y);
    }
    
    delay(500);
}