rockPaperScissors

function computerPlay() {
    choice = ['rock', 'paper', 'scissors'];
    let a = choice.length;
    let b = Math.floor(Math.random() * a);

    return choice[b];
}

function playRound(computerSelection, userSelection) {

    if (computerSelection == userSelection) {
        console.log('Tie!');
    } else if (computerSelection == 'rock' && userSelection == 'paper') {
        return 'Computer loses! Paper covers rock';
    } else if (computerSelection == 'rock' && userSelection == 'scissors') {
        return 'User loses! Rock crushes scissors';
    } else if (computerSelection == 'paper' && userSelection == 'rock') {
        return 'User loses! Paper covers rock';
    } else if (computerSelection == 'paper' && userSelection == 'scissors') {
        return 'Computer loses! Scissor cuts paper';
    } else if (computerSelection == 'scissors' && userSelection == 'rock') {
        return 'Computer loses! Rock crushes scissors';
    } else if (computerSelection == 'scissors' && userSelection == 'paper') {
        return 'User loses! Scissor cuts paper';
    }
}

let response = prompt('Choose: "rock" "paper" "scissors"');
response = response.toLowerCase();

function game() {
  computerScore = 0;
  userScore = 0;

  function playRound(computerSelection, userSelection);
  function playRound(computerSelection, userSelection);
  function playRound(computerSelection, userSelection);
  function playRound(computerSelection, userSelection);
  function playRound(computerSelection, userSelection);
}