console.log("Suddenly, Bieber stops and says, 'Who wants to race me?'")
// prompt写了两次
var userAnswer = prompt("Do you want to race Bieber on stage?")
if (userAnswer === "yes")
{
console.log("You and Bieber start racing. It's neck and neck! You win by a shoelace!")
}
else
{
console.log("Oh no! Bieber shakes his head and sings 'I set a pace, so I can race without pacing.'")
}