I have this above setup:

    PGraphics pgLeafs;

and this in setup:
        pgLeafs = new createGraphics(width, height);

I get the error:
createGraphics cannot be resolved to a type  

As quickfix i get,
-create a class....
- change to PGraphics
- fix project setup

I imported the whole core with:
import processing.core.*;

what must i do?