var SEC = 60;var MIN = 9;var STD = 0;
setInterval("startCountdown()",1000)
function startCountdown(){ 
if(MIN >= 10 && (SEC - 1) >= 10) {  
  SEC = SEC - 1;  
  numberCountdown.innerText = MIN + "." + SEC;
} else if(MIN >= 10 && (SEC - 1) < 10 && (SEC - 1) >= 0) {
  SEC = SEC - 1;  
  numberCountdown.innerText = MIN + ".0" + SEC; 
} else if( MIN < 10 && MIN >= 0 && (SEC - 1) < 10 && (SEC - 1) >= 0) {
  SEC = SEC - 1;  
  numberCountdown.innerText = MIN + ".0" + SEC;
} else if(MIN < 10 && MIN >= 0 && (SEC - 1) >= 10) {
  SEC = SEC - 1;
  numberCountdown.innerText = MIN + "." + SEC; 
} else if((MIN - 1) >= 10 && SEC == 0) {
  SEC = 59;  MIN = MIN - 1;  
  numberCountdown.innerText = MIN + "." + SEC;
} else if((MIN - 1) < 10 && (MIN - 1) >= 0 && SEC == 0) {
  SEC = 59;  MIN = MIN - 1;  numberCountdown.innerText = MIN + "." + SEC; 
} else if(MIN == 0 && SEC == 0) {  
  STD = STD - 0;  MIN = 9;  SEC = 59;  
  numberCountdown.innerText = MIN + "." + SEC; 
}
}