* _"Essentially we made a function that takes a two dimensional vector (x and y) and returns a four dimensional vector (r, g, b and a)."_ Really? Are you sure that’s what we did?
* What is smoothstep()? This example starts to lose me. There are many new elements here. Could you include a step by step walkthrough of this whole example before proceeding to the next part?
* Actually, this is the point where you lose me. I want it to be more gradual. It feels like there are 100 new concepts on this one page.
