krYSIA LUBI W KUCIAPKE

.button {
    position: relative;
    background-color: #4CAF50;
    border: none;
    font-size: 28px;
    color: #FFFFFF;
    padding: 20px;
    width: 200px;

    transition-duration: 0.4s;
        text-decoration: none;
    overflow: hidden;
    cursor: pointer;
}

 .button:after {
    content: "";
    background: #90EE90;
    display: block;
    position: absolute;
    padding-top: 300%;
    padding-left: 350%;
    margin-left: -20px!important;
    margin-top: -120%;
    opacity: 0;
    transition: all 0.8s
}

.button:active:after {
    padding: 0;
    margin: 0;
    opacity: 1;
    transition: 0s
}
.button:hover {
    box-shadow: 0 12px 16px 0 rgba(0,0,0,0.24), 0 17px 50px 0 rgba(0,0,0,0.19);
}

.button:hover span {
  padding-right: 25px;
}

.button:hover span:after {
  opacity: 4;
  right: 0;
}

.button span {
  cursor: pointer;
  display: inline-block;
  position: relative;
  transition: 0.5s;
}
.button span:after {
  content: '\00bb';
  position: absolute;
  opacity: 0;
  top: 0;
  right: -20px;
  transition: 0.5s;
}

.center
{
text-align: center;
}