three.js: rotate tetrahedron on correct axis

Question

I have to display a rotating tetrahedron in an animated HTML5 graphic, using three.js.

When i create the object, it\'s upside down, but it should be on the ground with o

Answer 1

Download three.js from [http://www.html5canvastutorials.com/libraries/Three.js] library and put in the below HTML code. 
You will get good output.