body {
  background-color: #000000;
  background-image: radial-gradient(ellipse at bottom, rgba(120, 120, 120, .85), black 130%);
  height: 100vh;
  margin: 0;
  overflow: hidden;
}
body::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: repeating-linear-gradient(0deg, rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4) 1px, transparent 1px, transparent 2px);
}
.code{
  text-align: left;
  white-space: nowrap;
  font: 3.5vw 'Courier', monospace;
  text-shadow: 0 0 4px #c8c8c8;
  color: #3ddd3d;
  width:90vw;
  margin:5vw;
}
.b {
animation: blinker 1s step-start infinite;
}
@keyframes blinker {
50% {
  opacity: 0;
}
}