.mySlides{
  display:none;
}

#slider{
  text-align: center;
  background-color: #000;
  width: 100%;
      height: auto;
      margin: 0 0 30px;
      min-height: 100px;
      background: #fff;
      border: none;
      -webkit-box-shadow: 0 0 1px rgba(0,0,0,.2);
      -moz-box-shadow: 0 0 1px rgba(0,0,0,.2);
      box-shadow: 0 0 1px rgba(0,0,0,.2);

}

#slider button{
  margin-top: -55px;
}