body {background:#0000ff; font-family:Courier; font-size:32px; color:yellow; }
div {margin:30px; float:left; width:600px; height:600px;}
canvas {border:2px solid green; background:#000;}
canvas:hover {cursor:crosshair;}
input {margin-top:10px; width:150px; padding:10px; background:gray; border:0; outline:none; color:#fff }
input:hover {background:orange;}
input#clear {margin-left:100px;}
img {display:none;}