The app draws a circle with numbered dots.
Then it draws a line from each dot to another dot using the number of the dot that the line starts from and multilpies it with the given multiplier to get the number of the dot the line will end on. If the number of the ending dot of the line is greater than the total amount of dots in the circle, it will continue counting on along the circle.
For example if the amount of dots is 42 and the multiplier is 2, then the line that start from dot number 23 would end up in dot 46. Since there are only 42 dots, the ending dot will be number 4.
Some nice-looking patterns will emerge from the lines when you try different combinations.
Since version 2.1 you can also save the patterns to PNG image files in your device so they can be for example printed and used for coloring.

If you like my work you can contact me via email.
Making small projects for android has been a hobby of mine since december 2018.