How to add a dot to the center of the slider (Range)?

Question

Slider

Good day, comrades. How to put a point in the center of the slider like in the image:

Here is my code:
codepen.io/anon/pen/dEQzWZ

Answer 1

If the question is in the visual design, something like this:
The principle is clear from here, and fitting to specific styles is on your own.