Ten Seconds

stop it at exactly 10.00. the numbers go dark at 3.

a stopwatch whose digits go dark after three seconds; stop it at ten by counting in your head

Your brain keeps time with no clock in it, by counting and by feel, and it is good but not exact: most people land within a few tenths of ten seconds, and the error grows with the length you are guessing. The three lit seconds give you the pace; after that the watch is honest about where your own count drifted. A stop here lands on a sixtieth of a second, so 10.00 is exactly six hundred frames.

Concepts: time, perception, rhythm.

An interactive you play with one thumb, on Wundr.