Chrome auto scroll up and down infinitely at certain speed

Question

I'm trying to have a tab in chrome auto scroll up and down infinitely at slow speed preferably. Can I set that up through Console? if yes, how?

Thank you in advance, Shqipdon

Answer 1

I'm using this code:

intervalThing = setInterval( function(){
    window.scrollBy(0,1)
}, 25); 

which seems to be working fine, and scrolls the page down however I need some sort of loop to run the lines of code below that will scroll the page up

intervalThing = setInterval( function(){
    window.scrollBy(0,-1)
}, 25); 

...and this needs to run infinitely or until page is refreshed.

Any ideas?