"Sky Writing" with multirotors?

Given that nearly everyone has LEDs installed on their multirotors for orientation, I thought, why not try doing a long exposure and flying it around?

I have 4 sets of LED's installed on my quad, but the front and back 2 are linked. They are connected to an Arduino nano which I coded up with an IR receiver, so I could change their colours remotely and easily.

The results: 



Next thing I want to try is basically setting up an auto mission to write out text in the sky. Has anyone tried this themselves?

Not 100% sure if this is the right section?



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