RedChair will press a random button from a list of your choice. It has a random press length and presses the button between a random time limit to help make it look less suspicious. After all, pressing the same button, for the same length every exact 10 seconds is a pretty obvious indication of a bot.
For key list see tobu.co/redchair
Want to use a modified button? (ctrl+e, shift+q, etc)
Place hotkey prefixes. See tobu.co/redchair#modifier
See README for instructions on how to use it, although it's pretty self-explanatory!