Bang! Pop! Fizz! go the fireworks,
A crackle! Comes and lurks
I sit under a tree
To look and see
The Bang! Pop! Fizz! of the fireworks,
A crackle! comes and lurks,
Have them on Bonfire Night,
What a sight!
The Bang! Pop! Fizz! of the fireworks,
A crackle! comes and lurks!

I’m enjoying your poems Ned. Here’s a little tip. You don’t need to put a comma at the end of every line.
The end of the line in a poem is a natural break, a bit like a comma. So only use it when you definitely need it to make the poem clearer to your reader.