Scrolling content right to left Javascript

I have a page with a horizontal width of 4000px

How would i go about creating an event that starts as soon as the page loads and cycles from the far right to left of the page? I want to show all the content and get the user back to the start if you get me

Ideally coded in javascript but will accept CSS3 (if it can be done)

Thanks Guys,

DIM3NSION

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