Something at the left side showing what keys you press detailed information on timing of the inputs:
K2 52ms // you press and hold down K2 for 52 miliseconds the release
210ms // you dont do anything on the keyboard for 210 miliseconds
K2 29ms
K1K2 63ms
K1 67ms
721ms
K2 46ms
62ms
K1 51ms
71ms
K2 50ms
66ms
K1 51ms
60ms
K2 81ms
999ms // doing nothing in 2 minutes
K2 71ms
Etc
K2 52ms // you press and hold down K2 for 52 miliseconds the release
210ms // you dont do anything on the keyboard for 210 miliseconds
K2 29ms
K1K2 63ms
K1 67ms
721ms
K2 46ms
62ms
K1 51ms
71ms
K2 50ms
66ms
K1 51ms
60ms
K2 81ms
999ms // doing nothing in 2 minutes
K2 71ms
Etc