body {
  margin: 0;
  background: black;
  color: #00FF00;
  font-family: 'Courier New', Courier, monospace;
  overflow: hidden;
}
.scrolling-text {
  position: absolute;
  width: 100%;
  height: 100%;
  animation: scrollUp 30s linear infinite;
  white-space: nowrap;
  text-align: center;
}
@keyframes scrollUp {
  0% { top: 100%; }
  100% { top: -100%; }
}