Have a look at these two examples and have a go at it yourself!
Doing things at the last minute was her way to cope with her perfectionism because she believed that if she started the task earlier, she would repeatedly check through her work right until the deadline anyway, and feel extremely anxious the entire time.
Here’s a diagram that shows how Jeannie’s perfectionism is maintained.
She admitted that nothing she achieves will ever be good enough for her, and is fearful of failures and having to live a life without any sense of personal satisfaction.
Here’s a diagram that shows how Tricia’s perfectionism is maintained.