Make priority for players

I'd use something like a counter, you add one to the counter everytime the player clicks the button, and when the counter reaches it's max number, lets say 5, it subtracts 5 and starts the cycle all over again. Here's an example:

 var counter : int = 0;

 function Update (){
 if(counter = 0)
 {
 "now it's player one's turn"
 }
 
 if(counter = 1)
 {
 "now it's players two's turn"
 }
 
 if(counter = 2)
 {
 "now it's player three's turn"
 }
 
 if("the dice is rolled")
 {
 counter += 1;
 }
 
 if(counter == 2)
 {
 counter -= 2;
 }
 }

alright I hope this helps!