Untitled

dabblet.css

span {
 animation: bounce 0.7s infinite ease;
 position: relative;
 font-size: 3em;
}

@keyframes bounce {
  0% {
    opacity: 1;
    top: 0;
  }
  100% {
   opacity: 0;
   top: 20px;
  }
}

dabblet.html

<span>↓</span>

dabblet.js

// alert('Hello world!');

settings.json

{"view":"split","fontsize":"100","seethrough":"","prefixfree":"1","page":"css"}