Simple Button

/** Button Simple
  * Language:  p5
  * @Author: Allen Thoe
  */

//Global Variables
var x, y;
var grey;
var showRect;
var count;

function setup() {
  createCanvas(400, 400);
  x = 60;
  y = 100;
  grey = 255;
  showRect = false;  //Boolean  -- 1 or 0
  count = 0;
}

function draw() {
  background(220);
  fill(grey);  //Color of ellipse
  if(abs(mouseX - x) < 40 && abs(mouseY - y) < 20){
    //INSIDE THE BUTTON
    grey = 100;
    if(mouseIsPressed){
      //DO SOMETHING
      showRect = true;
      //count++;
    }
  } else {
    grey = 255;
  }
  ellipse(x, y, 80, 40);  //rect(x, y, width, height, round)
  fill(0);  //Black text
  text("Click Me", x-20, y+5);
  if(showRect){
    rect(220, 240, 100, 40);
    fill(255);
    text("Count: " + count, 220, 280);
  }
}

/* When mouse button is released, this is executed*/
function mouseClicked(){
  count++;
}