Task: tune a guitar
Assumptions:
Tuning a guitar by hand.
Steps:
Tune the low fifth string first.
Tune the first string with another finger of the hand.
Set the fourth string in tune.
Perform the sixth string.
Tune the second string.
Tie the high fifth string in tune.
Play a chord to check that all of the strings are in tune.
Retune if any strings sound off.