Instructs a specific turtle to run a given set of instructions (which are usually turtle instructions).
ASK selects to the turtle whose index matches the
turtle input, runs
instructionlist, then reselects the previous turtle.
ASK outputs whatever
instructionlist outputs. If
instructionlist does not output anything, then ASK doesn't output anything, either.
; Send turtles out in four directions REPEAT 4 [ASK REPCOUNT [ RIGHT 90 * REPCOUNT FORWARD 100 ]