5 <title>CSS Masking: mask repainting.
</title>
6 <style type=
"text/css">
8 background-color: purple
;
10 margin: 1px 2px 3px 4px;
18 <div class=
"outer" style=
"top: 15px; left: 15px;"></div>
19 <div class=
"outer" style=
"top: 15px; left: 115px;"></div>
20 <div class=
"outer" style=
"top: 15px; left: 215px;"></div>