.slider {
  width: 100%;
  height: 600px;
  position: relative;
}

@media screen and (max-width: 630px) {
  .slider {
    width: 100%;
    height: 400px;
    position: relative;
  }
}
@media screen and (max-width: 400px) {
  .slider {
    width: 100%;
    height: 250px;
    position: relative;
  }
}

.slide1,.slide2,.slide3,.slide4,.slide5 {
  position: absolute;
  width: 100%;
  height: 100%;
}
.slide1 {
  background: url(../images/img1.jpg)no-repeat center;
      background-size: cover;
    animation:fade 16s infinite;
-webkit-animation:fade 16s infinite;
} 
.slide2 {
  background: url(../images/img2.jpg)no-repeat center;
      background-size: cover;
    animation:fade2 16s infinite;
-webkit-animation:fade2 16s infinite;
}
.slide3 {
  background: url(../images/img3.jpg)no-repeat center;
      background-size: cover;
    animation:fade3 16s infinite;
-webkit-animation:fade3 16s infinite;
}
.slide4 {
  background: url(../images/img4.jpg)no-repeat center;
      background-size: cover;
    animation:fade4 16s infinite;
-webkit-animation:fade4 16s infinite;
}
.slide5 {
  background: url(../images/img5.jpg)no-repeat center;
      background-size: cover;
    animation:fade5 16s infinite;
-webkit-animation:fade5 16s infinite;
}
@keyframes fade
{
  0%   { opacity: 1}
  20%  { opacity: 0}
  40%  { opacity: 0}
  60%  { opacity: 0}
  80%  { opacity: 0}
  100% { opacity: 1}
}
@keyframes fade2
{
  0%   { opacity: 0}
  20%  { opacity: 1}
  40%  { opacity: 0}
  60%  { opacity: 0}
  80%  { opacity: 0}
  100% { opacity: 0}
}
@keyframes fade3
{
  0%   { opacity: 0}
  20%  { opacity: 0}
  40%  { opacity: 1}
  60%  { opacity: 0}
  80%  { opacity: 0}
  100% { opacity: 0}
}


@keyframes fade4
{
  0%   { opacity: 0}
  20%  { opacity: 0}
  40%  { opacity: 0}
  60%  { opacity: 1}
  80%  { opacity: 0}
  100% { opacity: 0}
}
@keyframes fade5
{
  0%   { opacity: 0}
  20%  { opacity: 0}
  40%  { opacity: 0}
  60%  { opacity: 0}
  80%  { opacity: 1}
  100% { opacity: 0}
}