I believe the correct answer is a frantic rhythm.
Francisco Goya wanted to show the nightmares in the etching “The
sleep of reason produces monsters” by drawing himself asleep amidst his drawing
tools, his reason dulled by slumber and bedeviled by creatures that prowl in
the dark. He uses regularity of line and shape to create frantic rhythm (his
distress from fear and anxiety) with a benign effect in the lower half of the
work.
