A list of the files contained in this directory along with brief 
descriptions follows:

Begin.pm
--------
Initial state for head state machine.

FulSweep.pm
-----------
Performs a full-range, uninterrupted sweep of the head.

HlfSweep.pm
-----------
Performs a half-range, uninterrupted sweep of the head.

MrkrLook.pm
-----------
Performs a brief look for a localization beacon.

Sweep.pm
--------
Performs a head sweep that halts as soon as the ball is seen.

Track.pm
--------
State in which head tracks the ball.