Free Fall Writing
Then spend FIVE minutes writing free fall.
This means ANYTHING that comes up in your head. Just write for the sake of writing. Don't try to think of a character, or a setting, or a description. Just write what comes to mind. Even if it is "I don't know what the heck I'm writing..."
Free fall writing helps to clear your mind, helps to bring new ideas to light. It will make writing easier than when you always try to write with a clear idea in mind. It is even used as therapy. Google 'free fall writing' and you will find many websites and books devoted to the topic.
If you like it, do it again tomorrow. Just five minutes.
After a few days, make it ten minutes. Pretty soon, your free fall writing might take a shape, show you a pattern. But don't look for it soon.
Just write. Anything that comes to mind, without taking your pen off the paper!