void setup()
{
  size(500,500); //SET YOUR SIZE HERE
}
void draw()
{
  background(255);
  //DRAW EVERYTHING BELOW THIS LINE
  
  
  //DRAW EVERYTHING ABOVE THIS LINE
  fill(0); stroke(0); strokeWeight(1); textSize(20);
  text(mouseX+", "+mouseY,.05*width,.95*height);
}