@keyframes anim
{
  0%   { margin-left: 0px;   }
  50%  { margin-left: 200px; }
  100% { margin-left: 0px;   }
}

@keyframes anim2
{
  0%   { color: red;   font-size: 20px; }
  25%  { color: black; font-size: 20px; }
  50%  { color: green; font-size: 21px; }
  75%  { color: white; font-size: 30px; }
  100% { color: blue;  font-size: 20px; }
}

body
{
  background-image: url("https://upload.wikimedia.org/wikipedia/commons/thumb/2/26/Cat_8.jpg/180px-Cat_8.jpg");
  cursor: not-allowed;
  width: 200%;
}

p
{
  background-color: red;
  font-family: cursive;
}

h1 
{
  animation-name: anim;
  animation-duration: 1s;
  animation-iteration-count: infinite;
  animation-timing-function: linear; 
  cursor: zoom-in;
  color: brown;
}

h2, h3
{
  animation-name: anim2;
  animation-duration: 0.1s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
  background-color: yellow;
  cursor: zoom-out;
}

pre, code
{
  font-family: fantasy;
  background-color: rgba(255,255,255,0.7);
  color: green;
  cursor: none;
}

em, i
{
  animation-name: anim2;
  animation-duration: 2s;
  animation-iteration-count: infinite;
  animation-timing-function: linear;
}

b, strong
{
  color: #00f;
  font-family: emoji;
}

h1::before, h2::before, h1::after, h2::after
{
  content: '';
  background: url("https://upload.wikimedia.org/wikipedia/commons/3/36/Anarcho_pacifism_animation_2.gif?20190915203531");
  background-size: cover;
  display: inline-block;
  width: 64px;
  height: 64px;
}

a
{
  color: #0f0;
  cursor: row-resize;
}

a:hover
{
  display: none;
}

p:after
{
  content: "😀😁😂😃";
}

p:before
{
  content: " 𒐫 𒈙 ﷽";
}
