Graphing 2D Equations example missing from p5js.org/examples

[two-ticks]

'Graphing 2D Equations' example from https://processing.org/examples/ is missing from http://p5js.org/examples

'Graphing 2D Equations' example from https://processing.org/examples/ can be ported to http://p5js.org/examples

I would like to work on it