Happy St. Patrick’s Day!
To honour St. Patrick, I have three videos on creating Celtic knots. You see these knots on everyday items like this garden feature here. Learn how to make these knots for yourself and include some in your artwork.
These two are by David NichollsCeltic Design 1 (introduction)
Celtic Design 13 (a circular border)
and this one is by TheCelticGoldsmith
How to Draw a Celtic Spiral 1 - Double Spiralfrom Book of Kells (similar to Yin Yang)