From Creatures Wikia
TICK is a CAOS command used to set a timer running, or return the current setting of the timer period.
Syntax: TICK number_of_ticks (integer)
Returns, as an integer, TARG's current timer period (i.e., what it was last set to using the command above).
TARG HOTS TICK 40
Being used in the CAOS command line to display the tick value of HOTS:
TARG HOTS OUTV TICK