/* Animation property */
.screen {
  animation: scroll 5s infinite cubic-bezier(.52,-0.39,.3,1.43);
}
.screen:hover {
  animation-play-state: paused;
}
.screen:hover .message {
  opacity: 1;
  transform: none;
}
/* Keyframes */
@keyframes scroll {
  0%, 10% {
    background-position: 0 0;
  }
  20%, 30% {
    background-position: 0 -22em;
  }
  50%, 60% {
    background-position: 0 -44em;
  }
  90%, 100% {
    background-position: 0 0;
  }
}

/* Generat styling */
body {
  background: #36a1d9;
}

.screen {
  border-radius: 1em;
  background: #e25865 url(https://cssanimation.rocks/screen/images/screen_bg.png) no-repeat top center;
  background-size: 98% auto;
  border: 2em solid #fff;
  width: 40em;
  height: 30em;
  position: absolute;
  top: calc(50% - 17em);
  left: calc(50% - 22em);
  overflow: hidden;
}

.message {
  position: absolute;
  text-align: center;
  top: 4em;
  right: 4em;
  bottom: 4em;
  left: 4em;
  line-height: 6.75em;
  background: rgba(0,0,0,0.5);
  border-radius: 0.5em;
  color: #fff;
  font-family: Helvetica, Arial, sans-serif;
  font-size: 2em;
  opacity: 0;
  transition: all 0.4s ease-out;
  transform: translateY(0.5em);
}