still use a timer, but set it to run in milliseconds rather than seconds
Code:
 /timer -m 0 250 /titlebar <your titlebar information>
 

the -m makes the timer work in milliseconds, so 250 is 250 milliseconds, or 1/4 of a second (ie: 4 times per second)

Please note that millisecond timers are harder on system resources than regular timers.