Instant scroll to pixel position

So I have this website thats made of 1 scene thats about 10 000px in hight.
I’m trying to link buttons in my nav bar (which sticks to the top of the viewport) to specific point in the scene (2000px from the top, 3000px from the top…) so that I can allow easy navigation up and down the page, thus allowing people to skip strait down to a specific part of the website. However I’m having trouble finding any kind of info about this.
Any help, ideas or suggestions would be welcome.


Here's how you can jump to specific points:

Sorry should have been able to find that, Cheers!