How to stop iframe scroll?

[Pocha Kiwn]

Hey, I have iframed a tool on this post https://clickingspeedtester.com/scroll-speed-test/ The basic purpose of the tool is to test the scroll speed. But when someone scroll the iframed area it scrolls the whole page not just iframed area. I'm using this code <iframe class="lazyloaded" src="https://coinmasterspindaily.com/testing/" width="100%" height="200px" frameborder="0" data-rocket-lazyload="fitvidscompatible" data-lazy-src="https://coinmasterspindaily.com/testing/" data-was-processed="true"><span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: scroll; line-height: 0;" class="mce_SELRES_start"> </span><span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: scroll; line-height: 0;" class="mce_SELRES_start"><span data-mce-type="bookmark" style="display: inline-block; width: 0px; overflow: auto; line-height: 0;" class="mce_SELRES_start"> </span> </span></iframe> 

I want it to be like when someone scroll the iframed area it just scroll the iframed area not the whole page. Anyone can please help?