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

body {
  width: 100%;
  height: 100vh;
  background: #000;
  position: relative; /* Added this line */
}

marquee {
  height: 100vh;
}

.created-by {
  position: absolute;
  bottom: 10px;
  right: 10px;
  color: white;
  font-size: 14px;
}