I hate these days when you're sitting in front of the computer for several hours trying to get something out of your brain, but nothing seems to be good enough. I can recommend you to look up something on the internet to get inspired. This page https://fireart.studio/blog/15-examples-of-illustration-in-web-design-for-your-inspiration/ helped me a lot during my creation crisis, so I hope it'll do the same for you.
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