One is forever learning to think quickly for no matter how many times one may have acted spontaneously in the past, each new spontaneous action is singular. Always some brake that must be met. Always some objection to get around. The barriers are spontaneous, too, and only agile quick-witted thinking out-smarts that part of the brain that waits for you with the utmost caution.
The koi are quick witted, too. Quick and sleek swimmers are they, as agile as desire unstopped by will. Their direction is all their seeking. Of one seamless swift intention they move.
If the crayon can be made to move with fish-like certainty, that would be a koi drawing indeed.