#gameArea {
  width: 600px;
  height: 400px;
  position: relative;
  background: black;
  margin: 20px auto;
  border: 2px solid white;
}

#paddleA, #paddleB {
  width: 10px;
  height: 60px;
  position: absolute;
  background: white;
}

#paddleA {
  left: 20px;
  top: 170px;
}

#paddleB {
  right: 20px;
  top: 170px;
}

#ball {
  width: 10px;
  height: 10px;
  position: absolute;
  top: 195px;
  left: 295px;
  background: white;
  border-radius: 50%;
}