Looking for Processing graphics library.

I am sure I am not using the correct terminology but here goes...

After reviewing a website that shows how to display a plane rotating in a Processing window I decided I wanted to port this to a BOE Bot car to view in real time as it drives. The plane graphic is controlled by rotating a MPU6050 module and taking the serial output data from the Arduino IDE. I want to change the primitive plane graphic to a car.

So long story short...is there a website that has pre-coded images where I can cut and paste into my Processing code?

I have tried to search github but lack the tech vocabulary to search effectively. Is there any other option that offers free 3D images?

kikidog:
So long story short…is there a website that has pre-coded images where I can cut and paste into my Processing code?

And this is related to Arduino how?

How about http://tf3dm.com/3d-models/car?

A search of 'free 3d car model' turns up some more places.