This is one sentence with three clauses, each clause with a one-word verb.
The first clause is as simple as you could ever get: 'It is a tale'—Noun-Verb-Noun.
The subsequent three clauses all qualify that first clause:
- It is a tale
- Told by an idiot
- Full of sound and fury
- Signifying nothing
Each clause has a different grammatical structure but similar rhythm—and it's a different rhythm to what's come before.