Timer triggers Event

programming flash
1

Yes, I have posted this topic but its really urgent that I find a solution.

When the countdown timer reaches :30 i need a warning to display and/or sound.

ADDthis line of code:

if (outputSec == 30) { warning.text=“Warning” }

the code is below

function countDown() {
    if (Math.round(outputMin)==0 && Math.round(outputSec)==0 || chk==1){
        clearInterval(timer);
    }else {
        if (outputSec != "00") {
            outputSec = Math.round(outputSec) - 1;
            //trace(output);
        }else {
            outputSec = 59;
            outputMin = Math.round(outputMin) -1;
        }
        if (outputSec <= 9 && outputSec > 0) {
            outputSec ="0" + outputSec;
    
        }else if (outputSec == 0) {
            outputSec = "00";
        }
    }
}

chk=0;
stop();