Why is it used? what is its affect? It appeals to the feeling of your audience. By repeating a word or phrase, your readers or listeners start to anticipate the next line.
Example #1: Richard ll, Act 2, Scene 1 (By William Shakespeare)
“This blessed plot, this earth, this realm, this England,
This nurse, this teeming womb of royal kings.
This land of such dear souls, this dear dear land,”
Example #2: A tale of 2 Cities (By Charles Dickens)
“It was the best of times, it was the worst of times, it was the age of wisdom, it was the age of foolishness, it was the epoch of belief, it was the epoch of incredulity, it was the season of Light, it was the season of Darkness, it was the spring of hope, it was the winter of despair.”
My own example:
Then she went to the beach, then she went to buy ice cream, then she went to the changing rooms, then got undressed, then got in her swimming gear, then went surfing, then got to her car, then drove home