game

play game: win or lose

HTML

<div></div>

CSS

body {
    margin: auto;
    text-align: center;
    font-size: 128pt;
    font-family: sans-serif;
    font-weight: bold;
    line-height: 150px;
}

JavaScript

won=localStorage.getItem('won');

if (won == null) {
    won=''+Math.random()<0.5;
    localStorage.setItem('won',won);
    won=localStorage.getItem('won');
}

$('div').text(won=='true'?'you won':'you lost');