Four (episode)

1,2,3. 3 square clouds

Then, another cloud comes, and 3 wants to get rid of it.

Two throws 1 onto 3.

1 + 3 = 4

After 4 clones himself, he splits.

3 says she wants to be the biggest.

4 says he can be shorter.

3 height checks, and 4 is happy about being square.