1) Mind Apostrophes:
Possessive case or contractions: its VS it’s, they’re VS theirs.
2) Always use a comma after an introductory or prepositional phrase:
“After a hard...
Two little black birds
Sitting on the wall,
One named Peter,
One named Paul.
Fly away Peter,
Fly away Paul.
Come back Peter,
Come back Paul.
Come back black birds
And sit on...