How to Make a Window Hover

Hi is there any way to make a window hover above all other windows (so it never gets hidden by other windows/apps)? Is this possible using Keyboard Maestro or any other Mac software? If so, how? Thanks.

Use Custom Floating HTML Prompt with the setting "Floating"

Perfect. Now... if I leave that window open, how can I continually write to it. I have looked through tons of articles, samples on HTML and setting it as a target window. BUT, I can't find a simple "how to" that I can extrapolate from. Anyone care to create a super simple HTML window that can be easily written to. A perfect use case would be to use the window as a logging destination for monitoring/troubleshooting macros (for example, sending %TriggerValue% to it).