Slideshow 1:- 

<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<style>
.mySlides {display:none;}
</style>
<body>

<div class="w3-container">
  <h2>Slideshow Caption</h2>
  <p>Add a caption text for each image slide with the w3-display-* classes (topleft, topmiddle, topright, bottomleft, bottommiddle, bottomright or middle).</p>
</div>

<div class="w3-content w3-display-container">

<div class="w3-display-container mySlides">
  <img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKDjyrxc1fpcIDW1w4eCLgzy-x7jk_6ERc68SaLmOpG-dRcswf0AXnG_5TcHpPDvzhg7K0ThKzs3vm3iLojfPLD71DjQS0cJvGAPHwoGD-jFPe9NIhy8VoETRkLdPQVD8dTZ9emfx-nhGb/s320/valentines-day.gif" style="width:100%">
  <div class="w3-display-bottomleft w3-large w3-container w3-padding-16 w3-black">
    French Alps
  </div>
</div>

<div class="w3-display-container mySlides">
  <img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiu3XM47bLCDifJHyridLyraSeeEnK_GkhzUpDGCpmaMDt6vix-FWxHU3H_Th1BXDLOnAVbphY8pvCUIf8Sudf7ywjX6FkainrxlQryS6cLqZ1fedEqGJpKOUqq3PRLup9B66XqcKceU2Uw/s1600/animated-heart.gif" style="width:100%">
  <div class="w3-display-bottomright w3-large w3-container w3-padding-16 w3-black">
    Northern Lights
  </div>
</div>

<div class="w3-display-container mySlides">
  <img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhVD9myv_C0D-38fY17CMrsEPtYBpvFyLKGchkKYZJvur_fSv5rioS3IVWumy3bOielkcJIyQM2W6WRSUylkqpg-jAjVKnTDRbeRd44yjNoS4l-RVuB5cNv87VMsr_bBHawSKdPKJHkevsp/s320/Happy+Valentine%2527s+Day+2019+miss+you.gif" style="width:100%">
  <div class="w3-display-topleft w3-large w3-container w3-padding-16 w3-black">
    Beautiful Mountains
  </div>
</div>

<div class="w3-display-container mySlides">
  <img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEg5U35_d-mHzZmDGusqN3S0ZhemTfaFNuCw65DWP6s_ledjoZjWSj1k3LLQ3EHoAuij491LowMAC46x80oo3Js15ehtLExgBStvPO4U6vtx5cb_69bXDkjIZbacT9HZ6WQfZEaoxeIOtKqf/s320/SmoggyYellowEider.gif" style="width:100%">
  <div class="w3-display-topright w3-large w3-container w3-padding-16 w3-black">
    The Rain Forest
  </div>
</div>

<div class="w3-display-container mySlides">
  <img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEihGLU6Xf5o-pHpclepfsV2D9TLGhvaD8rbpm77lWVkaauyo0Fs_tRin52tdy1qj5sugXRUJe6Z7jC7HqqhANWmp0O6uFs6gNZo-ti5uUozevo5ffbmf6-ezMUnjw_FEtY1E1vAesuwbU8n/s1600/Animated_Valentines.gif" style="width:100%">
  <div class="w3-display-middle w3-large w3-container w3-padding-16 w3-black">
    Mountains!
  </div>
</div>

<button class="w3-button w3-display-left w3-black" onclick="plusDivs(-1)">&#10094;</button>
<button class="w3-button w3-display-right w3-black" onclick="plusDivs(1)">&#10095;</button>

</div>

<script>
var slideIndex = 1;
showDivs(slideIndex);

function plusDivs(n) {
  showDivs(slideIndex += n);
}

function showDivs(n) {
  var i;
  var x = document.getElementsByClassName("mySlides");
  if (n > x.length) {slideIndex = 1}
  if (n < 1) {slideIndex = x.length}
  for (i = 0; i < x.length; i++) {
     x[i].style.display = "none";  
  }
  x[slideIndex-1].style.display = "block";  
}
</script>

Slideshow 2:- 

<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<style>
.mySlides {display:none;}
</style>
<body>

<h2 class="w3-center">HTML Slides</h2>

<div class="w3-content" style="max-width:400px">
  <div class="mySlides w3-container w3-red">
    <h1><b>Did You Know?</b></h1>
    <h1><i>We plan to sell trips to the moon in the 2020s</i></h1>
  </div>

  <img class="mySlides" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKDjyrxc1fpcIDW1w4eCLgzy-x7jk_6ERc68SaLmOpG-dRcswf0AXnG_5TcHpPDvzhg7K0ThKzs3vm3iLojfPLD71DjQS0cJvGAPHwoGD-jFPe9NIhy8VoETRkLdPQVD8dTZ9emfx-nhGb/s320/valentines-day.gif" style="width:100%">

  <div class="mySlides w3-container w3-xlarge w3-white w3-card-4">
    <p><span class="w3-tag w3-yellow">New!</span>
    <p>6 Crystal Glasses</p>
    <p>Only $99 !!!</p>
  </div>

  <img class="mySlides" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiu3XM47bLCDifJHyridLyraSeeEnK_GkhzUpDGCpmaMDt6vix-FWxHU3H_Th1BXDLOnAVbphY8pvCUIf8Sudf7ywjX6FkainrxlQryS6cLqZ1fedEqGJpKOUqq3PRLup9B66XqcKceU2Uw/s1600/animated-heart.gif" style="width:100%">
</div>

<script>
var slideIndex = 0;
carousel();

function carousel() {
  var i;
  var x = document.getElementsByClassName("mySlides");
  for (i = 0; i < x.length; i++) {
    x[i].style.display = "none"; 
  }
  slideIndex++;
  if (slideIndex > x.length) {slideIndex = 1} 
  x[slideIndex-1].style.display = "block"; 
  setTimeout(carousel, 2000); 
}
</script>

Slideshow 3:- 

<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<style>
.mySlides {display:none}
</style>
<body>

<div class="w3-container">
  <h2>Slideshow Indicators</h2>
  <p>An example of using buttons to indicate how many slides there are in the slideshow, and which slide the user is currently viewing.</p>
</div>

<div class="w3-content" style="max-width:800px">
  <img class="mySlides" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKDjyrxc1fpcIDW1w4eCLgzy-x7jk_6ERc68SaLmOpG-dRcswf0AXnG_5TcHpPDvzhg7K0ThKzs3vm3iLojfPLD71DjQS0cJvGAPHwoGD-jFPe9NIhy8VoETRkLdPQVD8dTZ9emfx-nhGb/s320/valentines-day.gif" style="width:100%">
  <img class="mySlides" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiu3XM47bLCDifJHyridLyraSeeEnK_GkhzUpDGCpmaMDt6vix-FWxHU3H_Th1BXDLOnAVbphY8pvCUIf8Sudf7ywjX6FkainrxlQryS6cLqZ1fedEqGJpKOUqq3PRLup9B66XqcKceU2Uw/s1600/animated-heart.gif" style="width:100%">
  <img class="mySlides" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhVD9myv_C0D-38fY17CMrsEPtYBpvFyLKGchkKYZJvur_fSv5rioS3IVWumy3bOielkcJIyQM2W6WRSUylkqpg-jAjVKnTDRbeRd44yjNoS4l-RVuB5cNv87VMsr_bBHawSKdPKJHkevsp/s320/Happy+Valentine%2527s+Day+2019+miss+you.gif" style="width:100%">
</div>

<div class="w3-center">
  <div class="w3-section">
    <button class="w3-button w3-light-grey" onclick="plusDivs(-1)">❮ Prev</button>
    <button class="w3-button w3-light-grey" onclick="plusDivs(1)">Next ❯</button>
  </div>
  <button class="w3-button demo" onclick="currentDiv(1)">1</button> 
  <button class="w3-button demo" onclick="currentDiv(2)">2</button> 
  <button class="w3-button demo" onclick="currentDiv(3)">3</button> 
</div>

<script>
var slideIndex = 1;
showDivs(slideIndex);

function plusDivs(n) {
  showDivs(slideIndex += n);
}

function currentDiv(n) {
  showDivs(slideIndex = n);
}

function showDivs(n) {
  var i;
  var x = document.getElementsByClassName("mySlides");
  var dots = document.getElementsByClassName("demo");
  if (n > x.length) {slideIndex = 1}    
  if (n < 1) {slideIndex = x.length}
  for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";  
  }
  for (i = 0; i < dots.length; i++) {
    dots[i].className = dots[i].className.replace(" w3-red", "");
  }
  x[slideIndex-1].style.display = "block";  
  dots[slideIndex-1].className += " w3-red";
}
</script>

Slideshow 4:-

<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://www.w3schools.com/w3css/4/w3.css">
<body>

<div class="w3-content w3-section" style="max-width:500px">
  <p>The w3-animate-fading class animates an element in and out (takes about 5 seconds).</p>

  <img class="mySlides w3-animate-fading" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgKDjyrxc1fpcIDW1w4eCLgzy-x7jk_6ERc68SaLmOpG-dRcswf0AXnG_5TcHpPDvzhg7K0ThKzs3vm3iLojfPLD71DjQS0cJvGAPHwoGD-jFPe9NIhy8VoETRkLdPQVD8dTZ9emfx-nhGb/s320/valentines-day.gif" style="width:100%">
  <img class="mySlides w3-animate-fading" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiu3XM47bLCDifJHyridLyraSeeEnK_GkhzUpDGCpmaMDt6vix-FWxHU3H_Th1BXDLOnAVbphY8pvCUIf8Sudf7ywjX6FkainrxlQryS6cLqZ1fedEqGJpKOUqq3PRLup9B66XqcKceU2Uw/s1600/animated-heart.gif" style="width:100%">
  <img class="mySlides w3-animate-fading" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhVD9myv_C0D-38fY17CMrsEPtYBpvFyLKGchkKYZJvur_fSv5rioS3IVWumy3bOielkcJIyQM2W6WRSUylkqpg-jAjVKnTDRbeRd44yjNoS4l-RVuB5cNv87VMsr_bBHawSKdPKJHkevsp/s320/Happy+Valentine%2527s+Day+2019+miss+you.gif" style="width:100%">
  <img class="mySlides w3-animate-fading" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiu3XM47bLCDifJHyridLyraSeeEnK_GkhzUpDGCpmaMDt6vix-FWxHU3H_Th1BXDLOnAVbphY8pvCUIf8Sudf7ywjX6FkainrxlQryS6cLqZ1fedEqGJpKOUqq3PRLup9B66XqcKceU2Uw/s1600/animated-heart.gif" style="width:100%">
</div>

<script>
var myIndex = 0;
carousel();

function carousel() {
  var i;
  var x = document.getElementsByClassName("mySlides");
  for (i = 0; i < x.length; i++) {
    x[i].style.display = "none";  
  }
  myIndex++;
  if (myIndex > x.length) {myIndex = 1}    
  x[myIndex-1].style.display = "block";  
  setTimeout(carousel, 5000);    
}
</script>