Anakin Skywalker turning to Darth Vader

In Star Wars Episode 3 Anakin Skywalker was turning evil. He thought the Jedi Council did not trust him. He got angry. Anakin wanted to be a Jedi Master. When Anakin was a kid, all the Jed thought the Anakin could destroy the Sith. But instead he joined the Sith. He was tricked by Chancellor Palpatine who was really a sith lord spying on the Jedi. He was the Sith, Darth Sideous! The Sith were winning in the war against the Jedi. Anakin made the clones join the Sith and the Sith had a new empire!

This is Anakin and Darth Vader, but they are the same.
The one on the right is when Anakin was a Jedi
The one on the left is when he is a Sith called Darth Vader