body {
  background-color: tan;
  background-image: url(https://www.gif-maniac.com/gifs/55/54560.gif);
  background-size: 100% 100%;
}

#credo{
  font-size: 25px;
  color: white
}

@keyframes blink {
  0% {opacity: 0}
  49%{opacity: 0}
  50% {opacity: 1}
}

#add {
  animation: blink 1s infinite;
}

@keyframes shake {
  0% { transform: translate(1px, 1px) rotate(0deg); }
  10% { transform: translate(-1px, -2px) rotate(-1deg); }
  20% { transform: translate(-3px, 0px) rotate(1deg); }
  30% { transform: translate(3px, 2px) rotate(0deg); }
  40% { transform: translate(1px, -1px) rotate(1deg); }
  50% { transform: translate(-1px, 2px) rotate(-1deg); }
  60% { transform: translate(-3px, 1px) rotate(0deg); }
  70% { transform: translate(3px, 1px) rotate(-1deg); }
  80% { transform: translate(-1px, -1px) rotate(1deg); }
  90% { transform: translate(1px, 2px) rotate(0deg); }
  100% { transform: translate(1px, 1px) rotate(0deg); }
}

#add:hover {
  animation: shake 0.25s infinite;
}

#online {
  animation: shake 0.30s infinite;
}