Hi!

I'm trying to create a code for virtual drawing. i've tried using colour tracking but the 'dots' disappear and doesnt create lines.
this youtube shows exactly what i'm trying to achieve:


http://www.youtube.com/watch?v=z-3ZGrBjQ4g

I've just discovered the world of processing doing my final year product design project and would very much appreciate to get some help with the code!

Thanks a lot

- Anna Clara