Key thing to think about:
- the rhyme scheme as ABCBBB means that "B" lines will all rhyme with the last word
- I think "16 15 16 15 7" is talking about syllable count, so we need to make sure our first line has 16 syllables, etc
I am afraid of the water, as it can be scary down deep
With the unknown terrors lurking beneath the murky, dark blue
The things we do not know under the surface cause me great dread
For unless I find out, these unknown frights will be ringing true
Because I cannot see through
These great fears of the depths are mighty, and will never go askew
Thinking about the extensive sea can make me queasy
The thoughts swirling of it swallowing you up with jaws of darkness
Your lungs fill quickly with water, unable to breath easy
Leaves me hugely uneasy
(I am not actually afraid of water lol, but there are a lot of words you can use haha! I hope this will work for your assignment!)
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly. (ノ^∇^)
- Heather