snore (sleep with visual feedback)

Usage: snore [-v] [NUMBER[SUFFIX]...]

snore pauses for NUMBER seconds. SUFFIX may be 's' for seconds
(default), 'm' for minutes, 'h' four hours or 'd' for days. Given two
or more arguments, pause for the amount of time specified by the sum
of their values. A visual feedback is given by printing the flowing
of time in both ascending and descending order. If no arguments are
given, snore pauses for 1d (one day).