10 PRINT "HELLO WORLD"
Even the horrible crap I wrote as an novice is probably less embarrassing to me that the stuff I wrote as a journeyman who shoulda known better.
Thankfully, the most embarrassing things are, like, spending 2 days configuring postfix and not realizing that I could just read the log files and it tells me specifically what isn't working. A valuable lesson, but embarrassment has its cost.
mov ah, 2
mov dl, 7
int 21
int 20
jmp FFF0