REMEMBER (Click on a rule for more information)
RULE l: Aim the funnel at the target. Keep it so aimed throughout the experiment.
RULE 2: At each drop, move the funnel from its last position to compensate for the last error.
RULE 3: Move the funnel from the target to compensate for the last error.
RULE 4: At drop n, set the funnel right over the n-1 drop.