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Moving Arrow Based Scrolling Indicator for blog post. Is it possible in webflow?

Hey There! I am making a blog in webflow.
But stuck on a feature which I want for my blog but I am not finding any clue where should I start to make this interaction. A moving arrow based scrolling indicator which will move according to blog post section.

I have uploaded both the Desktop and Mobile View so that you get the idea what I want. Where should I even start? Do anyone have any solution here. Just a clue will be ok. Thanks in advance.