Help with the change of this background

Hey everyone :slight_smile: . I hope everything is fine. I wanted to know if someone could change this background for me. I would need it done with big black clouds and lightning if possible. To show that there is a storm outside.


I wanted to do it myself but I don’t know which free site used to do it. I know Pixlr but I don’t really understand how we use it. I just manage to create overlays… sometimes

Anyway, thank you in advance for your answer and you help. Have a lovely day :blush: