I WANT TO LEARN HOW TO CREATE A 3D PRELOADER BUT I HAVE FAILED... CAN SOMEONE HELP? I WANT TO LEARN STEP BY STEP THANK YOU?

i want to create a 3d preloader...
Let me give an example....
main item will be 3d closed plastics bottle....
i would like it to load till it reaches 100%...
inside the 3d closed plastics bottle at every 10 % a new colour is loaded until 100%....

I have no site example of a site... If any refer it to me and i shall explain more...

but i do not want to make the 3d bottle preloader? i just want to learn....