Countdown, Liftoff! (4-3)

/*
 * Programming Quiz: Countdown, Liftoff! (4-3)
 * 
 * Using a while loop, print out the countdown output above.
 */

// your code goes here
var T = 60;
while (T>=0){
    if(T===50){
      console.log("Orbiter transfers from ground to internal power (T-50 seconds)")  ;
    }
    else if(T===31){
        console.log("Ground launch sequencer is go for auto sequence start (T-31 seconds)");
    }
    else if(T===16){
        console.log("Activate launch pad sound suppression system (T-16 seconds)");
    }
   else if(T===10){
        console.log("Activate main engine hydrogen burnoff system (T-10 seconds)");
    }
    else if(T===6){
        console.log("Main engine start (T-6 seconds)");
    }
    else if(T===0){
        console.log("Solid rocket booster ignition and liftoff! (T-0 seconds)");
    }
    else{
         console.log("T-"+T+" seconds");
    }
    T = T-1;
}