If it's the sort im thinking of it's used for talsmanic/ sigil purposes. And if this is what you are talking about then you can absolutely make your own!
A rune wheel is an example of what i mean. a circle broken with 4 lines, 8 points. On each point is the first rune of an aett, the second and so on. each point has 3 runes. since 8x3=24. The lines are intersected or marked at the respective runes to make the sigil.