There aren't really any instructions. Just click the green flag, and watch the dots fall, clone, and pop. This was my first project on Scratch, ever. I'm surprised I even still come back to it.
It all started in my technology class, when I made a red ball fall and regenerate. The following day, I experimented with changing the X-position every time it fell (you can find the "random # selector" in the operators section). Then, I changed the color of the balls as well, making them appear even more randomly. I also added a popping sound when they hit the "floor". Later on I varied the speed of the cloning dots, so it could seem like one is faster than another. A very recent update added a slider for controlling how many clones are present at any one time. Since clones can cause massive lag when overused, the limit is 15 maximum. You can also have only one dot on the screen at any time. (And no, this is NOT the project that I said would be "significantly improved".) And finally, I added a visual "pop" when the balls reach the bottom. I also did some script cleanup and changed everything to use vector graphics. Now I think this project is finished. :)