KNOCKING

Rin tin tin challenged his friend to a game
Rat tat tat was the other challengers name
Both would knock on a door then run away
What an exciting game they decided to play

Rin tin tin went first on a bright blue door 
Nobody answered but I can't say for sure
Rat tat tat then gave number three a knock
The resident here left their key in the lock

This whole street was knocked by these two
The next day they wanted something else to do
So no more knocking it was the end of all that 
What became of rin tin tin and rat tat tat ?