.hgh {
  display: block;
  margin-left: auto;
  margin-right: auto;
  max-width: 100%;
  box-shadow: 8px 8px 12px gray;
  border-radius: 5%;
}

.hgh:hover {
  /* Start the shake animation and make the animation last for 0.5 seconds */
  animation: shake 0.5s;
  /* When the animation is finished, start again */
  animation-iteration-count: 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, -2px) rotate(-1deg);
  }
}

.content {
  background-color: black;
  background-image: url(../img/programming.jpg);
  background-size: cover;
  background-repeat: no-repeat;
}