Patterns do not get much simpler than this one. A piece of chenille is fixed to a hook in a minimal number of wraps using thread of the same color. The red worm is the one most often seen, but the pattern can be tied in any color.
Place the hook in the vise and secure the thread behind the eye. Run the thread along the shank forming an underbody a little beyond the start of the bend.
Take a piece of chenille 3 to 4 hook lengths long. Flame taper the ends to give them a slight taper and then secure it near the bend with 3 tight wraps.
Advance the thread along the underbody and then secure the chenille with tight wraps. Continue to add evenly spaced tie down points along the shank of the hook until you get to the start of the underbody.
Cast off the thread by applying a whip finish behind the eye, without catching the chenille. Applying head cement directly to the thread before doing the whip finish is an easy way to finish the fly.