MOO programs are made up of statements.
All statements end in a semicolon.
Statements also can include other statements, in the body of a MOO command. The for loop is a statement, and the 'body' of the for loop contains a statement. This is also a nested statement, one statement in a the body of the fork, and the fork counts as a statement. Statements are made up of commands or expressions. Commands tell the moo to do something.