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!