#ball {
  width:150px;
  height:150px;
  padding:150px;
  border-radius:50%;
  background-color:black;
  text-align:center;
  color:white;
  font-size:100px;
  font-family:arial;
  margin: 0 auto;
}
#controls{
  margin:0 auto;
  text-align:center;
  font-family:arial;
}
#result{
  font-size:30px;
  font-weight:bold;
  text-shadow:2px 2px 5px blue;
}
h1 {
  font-family:arial;
  text-align:center;
  font-size:50px;
}
body{
  background:green;
}