Specs for Lubin1

1.  INTRO: get subject initials, subject number .
2. Randomize the list of al the AVI files in that directory. 
3. Put up disks to collect calibration data just as in Henderson .
4. Play each of the AVI files in turn. Start by having subject fixate in the center, as in Henderson. Then play the movie, recording eye position as in Henderson. Then go to blank screen and have subject click when he's ready to continue. 
5. At the end of playing the AVI files, put up the disks (or plus signs) again to collect final calibration data. 
6. Thank subject and write data to disk as in Henderson (or perhaps you want to write it as you collect it). Subject 999 should be a test and don't write the data out for this subject number.