Once upon a time there were four friends. They hung around together, nearly always in the same order like this:
A B C D
They were noted for their cheerful sounds.
Even on those occasions when they were out of sorts Like this:
D A B C
They looked very happy. One day, they were joined by the twin of friend number 2. The twin always took first place and bumped the former friend 2 to third place like this:
B A B C D
For a time, life had no meaning.
The five decided to try inviting others to lead their group. At first it was hard work,
1 B A B C D
so on their second try they rented a vehicle.
2 B A B C D
The third time, they all went for a walk.
3 B A B C D
The next time was almost a disaster: the lights all went out but they were soon able to put that to rights.
4 B A B C D
Finally, they went to the zoo and watched an animal being born.
5 B A B C D
These activities were so much fun that the five invitees got together and had their own party.
1 2 3 4 5
They had such a wild time they woke up in a completely different state!
Identify the friends.