Drawing a Trefoil

Three interlocked circles sounds easy enough to draw, but it can be hard to get them to look balanced. Fortunately I have an easy solution for you.

Here's an easy method to draw a trefoil:
Illustration of step 1 Start by drawing a plus.
Illustration of step 2 Place a mark one-sixth of the way up the top arm, then place two more marks above the center of each horizontal arm at that same height.
Illustration of step 3 Draw in two pluses: each plus should be the same size as the original and the end of their top arms should be at the marks above the original plus' horizontal arms.
Illustration of step 4 Your trio of pluses are now in position to guide your creation of three interlocked circles. Add a mark to the ends of each arm to show you where the inner circles go. The closer to the center of the plus these marks are, the thicker the outline will be.
Illustration of step 5 Add in your circles like you normally would and then fill in the outline to finish your trefoil.
Illustration of step 6 There is an alternate design for this symbol in which the centeral portion is removed. To make this design, just erase the area marked in green.