v.important : Choose one from functions to execute !!

Hello guys , i have two functions (RotateRight & RotateLeft), please how i can choose one of two functions to execute one of them randomly when the script executing !!

i try this code :

 var functions = [RotateRight,RotateLeft];
 
 
 function Update(){
 if(Timer1>=2){
 functions[Random.Range(0,functions.Length)]();
 }
 if(Timer1>=5){
  TranslateBack = false ; 
  TasadomDone = true ;
  Timer1=0 ;
 }
 
 }

the problem here that the script execute this : functions[Random.Range(0,functions.Length)](); and still choose between the two functions without execute the next Lines . where id the problem here ??! i want every time choose one of two functions only , then executing the next lines . sorry for question , i,m a beginner , and sorry for my english :(