++++++++++++++++++++
++++++++++++++++++++
++++++++++++++++++++
++++++++++
++
Increment current byte to 72 (= 'H' in ASCII)
> Move forward
++++++++++++++++++++
++++++++++++++++++++
++++++++++++++++++++
++++++++++++++++++++
++++++++++++++++++++
+++++
Increment current byte to 105 (= 'i')
> Move forward
++++++++++++++++++++
++++++++++
+++
Increment current byte to 33 (= '!')
> Move forward
++++++++++ Increment current byte to 10 (= '\n')
<<< Move backward 3 times in a row
.>.>.>. Print current byte; move forward and print current byte 3 times in a row; effectively print a string of length 4
If I was an insane savant I could maybe figure out something short and clever with loops but I'm not