Hello @rahulhussain 
It’s totally possible without coding! Using interactions for the scroll-to-appear effect, and putting a div in the middle at the “vertical timeline bar”, it could happen.
For more information on interactions, check out our interactions demo page: https://interactions.webflow.com/
When you’re done checking that out, check out of video tutorials: http://tutorials.webflow.com/nav-appears-on-scroll
I hope this helps 