https://github.com/atoponce/scripts/blob/master/mouse-entropy.html
- Generate a 512×512 pixel random bitimage with the browser CSPNG and animate it.
- Record the pixel color (bit) underneath the (x, y) coordinate at event interrupt.
- Collect 8 bits, then:
- Collect and store the timestamp least significant byte into the entropy pool.
- Assemble coordinate bits as single byte and store in the entropy pool.
- Store the vector distance from the canvas origin (0, 0).
- Store the vector magnitude (angle in arcseconds) from the canvas origin (0, 0).