<!DOCTYPE html>
<html>
<link rel='stylesheet' type='text/css' href='style.css'>
<style>
progress {
-moz-orient: vertical;
height: 12em;
width: 2em;
}
body > progress:nth-child(1)::-moz-progress-bar { height: 20px; }
body > progress:nth-child(2)::-moz-progress-bar { height: 0px; }
body > progress:nth-child(3)::-moz-progress-bar { height: 50%; }
body > progress:nth-child(4)::-moz-progress-bar { height: 1em; }
/* last one is for the default value: width=100%. */
</style>
<body>
<!-- Those will be used to change padding/margin on ::-moz-progress-bar -->
<progress></progress>
<progress></progress>
<progress></progress>
<progress></progress>
<progress></progress>
</body>
</html>