You can't.

At least, not easily.

You can express it mathematically or programmatically incredibly obtusely, but no one could see what you were talking about..

It'd be turned from what a human understands, a simple line on the page, into what a computer understands, a mathematical formula.

It'd be taking mathematical representations ingenuously developed for a certain field of understanding and applying it haphazardly to another.

This is the creative coder's conundrum; switching from a form you innately understand to one you don't, switching from the viewport to the text file and back again when you need to make another change.

When the scribble, the primitive of creative thought, cannot be expressed in a medium you know it's a creatively limiting one.

We need to build tools we can scribble in.