trefoil art (example of chirality)

I was inspired and had a little fun with the Paint program on the computer tonight. (The ability to create neat stuff is very limited with Paint.) What inspired me to create this pattern? An elegant trefoil, illustrated in both enantiomorphs. If you had a string and made both of them, it is impossible to make one look like the other no matter how hard you try (without cutting the knot, of course).