* {
  margin: 0;
  box-sizing: border-box;
}

body {
  background-color: rgb(20, 20, 20);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
}

h1 {
  color: white;
  font-family: Verdana, Geneva, Tahoma, sans-serif;
  margin: 20px;
}

#movableObject {
  width: 100px;
  height: 100px;
  background-color: white;
  border-radius: 50%;
  position: absolute;
  top: 100px;
}