A timer that depleted based on a random number within the players current speed divided by a random number within the players current score.

A timer that depleted based on the players current score times 0.05

A timer that depletes based on the players speed (it went from 1000 to 0 in less than a second)

A timer that depletes based on the timer. (by this point i started to get tired.)

currently im depleting the timer at a rate of .05 * the players current score. The higher you score the faster it depletes. The faster you hit the checkpoints the more points and more time you get, but the faster the timer goes as a direct result.