rock scissors paper

var userChoice = prompt("Do you choose rock, paper or scissors?");
 var computerChoice = Math.random();

    if (computerChoice < 0.34)
        {
            computerChoice = "rock";
        }
    else if(computerChoice <= 0.67)
        {
            computerChoice = "paper";
        }
    else
        {
            computerChoice = "scissors";
        }

    var compare = function(choice1, choice2)
    {
      if (choice1 === choice2)
      {
     return "The result is a tie!";
      }
// CHOICE1 = ROCK
      if (choice1 === "rock")
      {
          if (choice2 === "scissors")
          {  return "rock wins";
          }
          else {  return "paper wins";
          }
        }
//CHOICE1 = PAPER       
    if (choice1 ==="paper")
    {
       if (choice2 === "rock")
       { return "paper wins";
       }
       else { return "scissors wins";
       }
    }  
// choice1 = scissors
 if (choice1 === "scissors")
   {
       if (choice2 === "rock")
       { return("rocks wins");
       }
       else { return ("scissors wins");
       }
   }
   
    };
   
    compare(userChoice, computerChoice);