Slider-Whistle
An option to make the direction text moves in reverse when the end of the input is reached, to create a kind of "bouncing" effect. I really can't see a use for it, but maybe this could be expanded upon with an extra option to make the text move even when it's within the character limit with space padding. [This page](https://www.quackit.com/html/codes/html_marquee_code.cfm) has a demonstration for the kind of thing I'm talking about. It's not something I really want myself, but somebody might need it.