I invented a trick.
Since i am poor and cant afford quality nail polish, i learned that if I paint my nails in some color, then as it starts to peel off on its own, paint another coat over it of a different color, and so on, as the paint is falling off you get strange and cool looking designs.
Like, the paint doesnt fall off the regularly, so the parts in which it fell and the parts of the new paint which are falling, get some nice designs.
Another thing I do is to paint for ex a solid colour all my nails, then using a thin brush paint lines or designs on the other nails.
It's artistic.