noname

 
<style>
input.button4 {
  position: relative;
  display: inline-block;
  font-family: Arial,Helvetica,FreeSans,"Liberation Sans","Nimbus Sans L",sans-serif;
  font-size: 1.5em;
  font-weight: 700;
  color: rgb(245,245,245);
  text-shadow: 0 -1px rgba(0,0,0,.1);
  text-decoration: none;
  user-select: none;
  padding: .3em 1em;
  outline: none;
  border: none;
  border-radius: 3px;
  background: #0c9c0d linear-gradient(#82d18d, #0c9c0d);
  box-shadow: inset #72de26 0 -1px 1px, inset 0 1px 1px #98ff98, #3caa3c 0 0 0 1px, rgba(0,0,0,.3) 0 2px 5px;
  -webkit-animation: pulsate 1.2s linear infinite;
  animation: pulsate 1.2s linear infinite;
}
input.button4:hover {
  -webkit-animation-play-state: paused;
  animation-play-state: paused;
  cursor: pointer;
}
input.button4:active {
  top: 1px;
  color: #fff;
  text-shadow: 0 -1px rgba(0,0,0,.3), 0 0 5px #ffd, 0 0 8px #fff;
  box-shadow: 0 -1px 3px rgba(0,0,0,.3), 0 1px 1px #fff, inset 0 1px 2px rgba(0,0,0,.8), inset 0 -1px 0 rgba(0,0,0,.05);
}
@-webkit-keyframes pulsate {
  50% {color: #fff; text-shadow: 0 -1px rgba(0,0,0,.3), 0 0 5px #ffd, 0 0 8px #fff;}
}
@keyframes pulsate {
  50% {color: #fff; text-shadow: 0 -1px rgba(0,0,0,.3), 0 0 5px #ffd, 0 0 8px #fff;}
}
</style>
 
<input type="button" class="button4" value="Купить">
<input type="button" class="button4" value="Купить">
<input type="button" class="button4" value="Купить">