Thanks for the reply Carl,
What I did in your jsfiddle code, I commented the line TweenLite.to("#gentags",2, {scrollTo:{x:400}}) because I don't need to scroll the right to left on page load.
Now when I am scrolling the mouse wheel upside then animation is working from left to right. This is not a right. I need when mouse scroll wheel up then animates from right to left and mouse scroll wheel down then animate from left to right. I need a fast scroll.
something like https://www.tentwenty.me/about-us
Can you help me out in this?