I want to play sound also, when the mouse is over my smiley... How to do it?
(Thanks!)

1. String message = "☺";
   float x, y;
   float horisontalR, verticalR;
   
   void setup() {
     size(300, 300);
     textFont(createFont("Georgia", 120));
     textAlign(CENTER, CENTER);
     horisontalR = textWidth(message) / 2;
     verticalR = (textAscent() + textDescent()) / 2;
     noStroke();
     x = width / 2;
     y = height / 2;
   }
   
   void draw() {
     fill(205, 120);
     rect(0, 0, width, height);
   
     if (abs(mouseX - x) < horisontalR &&
         abs(mouseY - y) < verticalR) {
       x += random(-5, 5);
       y += random(-5, 5);
     } 
     fill(0);
     text("☺", x, y);
   }