I am writing an exam for my students, and the topic is intro knots theory. I have no idea how to put knots into the file, but I know many MO users who can draw amazing diagrams in their papers. 


Can someone please provide some hints on what can be used, preferably with some example codes? I do not need complicated diagrams, just some simple knots and links with few crossings. Thanks in advance. 



How to draw knots with Latex? 
Knotinfo has .png files of all knots of 12 crossings or less.  

<http://www.indiana.edu/~knotinfo>


