A little mini-project I made. Hit SPACE and input a numerical value to change the pattern. For the best results, I would use 0-10 as the value for the best results, but you can do any number, even decimals. After inputting, the project will stop. You will then need to click the green flag again to see your new pattern. 5.7 is by far my favorite value to use.
I made this while trying to simulate a Spell Card from the Touhou Project: Fantasy Seal. I made a graphic that fit but then couldn't really get anything like Fantasy Seal so I made this instead.