<!DOCTYPE html>
<html>
<head>
<title>mspace</title>
</head>
<body>
<math style="position: absolute; top: 0; left: 0;">
<mspace width="50px" height="3em" depth="3em" mathbackground="red"/>
<mspace width="40px" height="1em" depth="2em" mathbackground="green"/>
<mspace width="30px" height="2em" depth="1em" mathbackground="blue"/>
</math>
</body>
</html>
