first digit = value to ramp to
second digit = ramp time in ms
third digit = offset from the time when the message box was banged
in your example, [1 1000, 0 0 1000, 1 1000 1000(, it will ramp up to 1 in 1000ms, then down to 0 in 0ms, then back up to 1 in 1000ms.