final color WHITE = color(255);
final color BLACK = color(0);
PFont standardFont = createFont("Arial", 20);

void setup()
{
  size(600, 400);
  background(WHITE);
 
}

void draw()
{
  background(WHITE);

  fill(BLACK);
  textFont(standardFont);
  textAlign(CENTER);
  {
    String string_of_text;
    string_of_text = "(" + str(int(mouseX)) + "," + str(int(mouseY)) + ")";
    text(string_of_text, width / 2.0, height - 20); 
}
  //
  // insert your code here
  //
 
}