Upcoming Events on all Pages

[Front Range 4x4]

I did this little template mod to show Upcoming Events on the top of FORUMHOME but have failed miserably to create a plugin to show it on all pages.

https://vborg.vbsupport.ru/showthread.php?t=234407&highlight=upcoming+events

I'd love to either understand how to do it right or see someone else do it.

TIA!