[Trigger DrawSVG on scroll]

I'm creating a series of icons to animate, but I need to trigger the animation when they come into view (they occur near the footer of the page). I've tried a variety of solutions, including ScrollMagic based upon a solution offered in this forum, but without success. Any suggestions? Are already discussions on this topic?

Thanks

See the Pen Jjdopmp?editors=1111 by McKern (@McKern) on CodePen