A test of OpenJSCAD
Here's an example of a coloured tetrahedron:
hello
<div oncontextmenu="return false;"
id="viewerContext"
style = "width:640px;height:470px;"
design-url="tetrahedron.jscad"></div>
<div id="tail" style="display: none;">
<div id="statusdiv"></div>
</div>