Screen is glitching on macbook!

Hi
I am doing this on behalf of my sister.
Just recently the screen on her Macbook Pro started glitching for some unkown reason.
She is still able to move the mouse but she cannot do anything else, restarting the system doesnt seemed to have worked either.
Here are some screenshots:
We have no idea why this is happening, and would greatly appreciate it if someone could come up with a solution.
We have been looking everywhere to find a solution.
Kind regards.

Okay Problem solved.
Turns out that it was caused by a program called Alchemy, a free art tool.

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