It's an interface and on that interface the server is sending different frames (textIds).
Each interface has a unique set of sendFrames so if you find the interface you want, call it, locate the sendframes, and then change them sendframes server-sided correspondingly to represent a countdown timer of some sort - changing the text each time a second goes down.
Just as an example (values aren't correct)...
Code:
INTERFACE: 1;
TEXTFRAMES: 2, 3, 4;
textChange("My own custom timer!", 2);
textChange("Time until text reads 'Start:'", 3);
if (timer != 0) {
textChange(""+timer, 4);
} else {
textChange("Start!", 4);
}