i am not very sure about this and i am new in this language but i believe if you change that:
PHP Code:
if (roundtime > 0)
to
PHP Code:
while (roundtime <= 30) {
set_hudmessage(255, 255, 255, 0.02, 0.29, 0, 6.0, 1.0)
show_dhudmessage(0, "T: %d", roundtime)
}
test it and if it works change the set_hudmessage for the color and position and others...