* {
	margin: 0;
	padding: 0;
	box-size: border-box;
html, body {
	height: 100%;
div {
  height: 25vw;
  width: 25vw; /* calc(100% /4); */
  background: tomato;
  display: inline-block;
  text-align: center;
  line-height: 25vw;
  font-size: 20vw;
  position: relative;
  margin-right: -5px;
div:before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  height: inherit;
  width: inherit;
  background: rgba(200,200,200,.455);
  transition: background 320ms;
div:hover:before {
  background: rgba(200, 200, 200, 0);


// solution

CodePlay Playground as you play with the keyboard:


The CodePlay Code Box Editors Playground is very simple to use, anyone can directly interact with a minimum of knowledge of HTML experience, live an idea or a project. We believe that only 5% of the developers has the full capacity and knowledge of each key on the keyboard. Therefore we decided to put together a single command from the Key [Esc] == 27.
For every need and every situation the keyboard [Esc] key fixes and puts in place the Original Initial Code Box Editors.
All this without losing the contents of each Box Editors .
!Enjoy your CodePlay.

CodePlay Playground is a project based on WordPress entirely revised to have a clean and dynamic HTML output.


- [Esc] To reset the Box Editors and the closure of any open window overlay, including the Output (FULL) Preview.

New! - Double Click to Expand /Open & Close All Box Editors

New! - Ctrl + Up/Down to Show /Hide the Footer Bar. This allows hide footer bar when you want, + ESC to Back.

New! - Preview in Full page is now also possible via dblClick on the Vertical Drag-bar. Each keyboard action can be Reset via the ESC button.

- Close this? [Esc], or a Click outside.

Front End User - New /Save Post is Now Open, Register *required.
New Play Now