I have a full fledged model in my 1st playground with lightings, progressive load textures and some animations. Now, I have my 2nd playground which is the main stage, I would like to add the model along with its attributes into my 2nd Playground. So instead of copying the whole code and then adding it in 2nd playground, is there an alternative way where I can download the 2 playgrounds (.html) and then integrate 1st html (model) into my 2nd html (main stage) ? Obviously the camera and render canvas from 1st playground is not needed. So what is the best way to do this?