Use maths to describe how the screen is lit, at 60 frames per second, depending on mouse and time and the space you create
How to use it
If you try to do something, you'll probably fail.
"Try not. Do, or do not. There is no try." -Master Yoda
Don't expect too much without a bit of practice, though.
If you randomly press buttons and see what happens, maybe you're on the right way.
Pixels are white if grey > 1, black if grey < 0
And grey between 0 and 1
Be aware that the screen could eventually blink fast, people with high light sensitivity should know how to exit quickly (or turn one's head)