Thank you @kittycat526 for the original project. All that's great about the art is by @kittycat526. All the imperfections are by me (@kriblo), as I did some necessary modifications. All active code is by me. Click the green flag and move the mouse around. I have offset the pupil and iris of the eye in two separate costumes, and used the fisheye graphic effect to distort these as the eye looks towards the mouse pointer.
Original instructions by @kittycat526: click the green flag and watch my speed draw/animation of my first attempt on an eye. You can also watch it in Turbo Mode if you hold shift and click the green flag :3