Let us put the sentence: "I run fast," into pictures.

Understand, you can handle this anyway you choose.

The only rule is that the idea in your mind is conveyed.

Your imagination "fills in the blanks".

To handle the idea of "fast", because
(speed+time) is involved, I will define
numbers and associate a picture with it to make
the reader understand: "increments" or "an increase" etc.

Note: Below all "numbers" are represented "mathematically".

For distance:

"I run fast"