All events have already happened, and time loops exist by themselves. The end is the beginning, and the beginning is the end.

What if, day or night, a certain demon crept up to you in your most solitary solitude and said to you: "This life, as you are living it now and have lived it, you will have to live it again and countless more times; and nothing in it will be new, but every pain and every pleasure, every thought and every sigh and everything inexpressibly small and great in your life will have to come back to you again, and all in the same order and in the same sequence. The eternal hourglass of existence is turning over and over again — and you are with them, a grain of sand!"

Friedrich Nietzsche