From scroll arrows to scroll mouse icon we have seen various scroll indicators in web design. This series of scroll indicators were designed by nxworld, it has multiple scroll arouws and mouse icons that can be used to give a visual cue to vistors to encourage them to scroll down.
If you are having trouble with the pen, try the archived copy on GitHub
Animated Scroll Down Icons
See the Pen demo:CSS scroll down button by Naoya (@nxworld) on CodePen.0