Example
copy the following code into your post's HTML tab, replacing the <img> src and the <h2> text.
<style>
.mySlides {
display:none;
position: relative;
width: 100%; /* for IE 6 */
}
h2 {
position: absolute;
top: 10px;
left: 10px;
width: 100%;
}
</style>
<br />
<div class="w3-content w3-section" style="max-width: 200px;">
<div class="mySlides">
<img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEitnBbsu_bTLW70HJfkGPPhYHd1uy_oEMltHKThLYRR3Lo6DoFwBQF0MFHnYD-Gut8Udd4848KN8YC_vAfVh0ir_gWMOH4tJH4EGZpV3pzTk4lSzmsiADO85taMMw-B6rW_Ppo1VaKhPbub/s320/Screen+Shot+2017-06-23+at+9.53.26+PM.png" style="width: 100%;" />
<br />
<h2>
Set</h2>
</div>
<div class="mySlides">
<img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQvf5RaHRdkYDb4WiZXrp3R7IVu78KdCbdyFWHtDT5ljeYHO57OE6gVQE0Zj0BUfgnnaGBXSdhgbeZWeQ4xBQsYDc-VgGFk3xa2IimQPtNZvezGI73IBAreEw516XZngY4gxBx9wCB1SbB/s320/Screen+Shot+2017-06-23+at+9.56.12+PM.png" style="width: 100%;" />
<br />
<h2>
SortedSet</h2>
</div>
<div class="mySlides">
<img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdL9x2_XqgV9PdPT4xsU-PnH67hr8YKUiEuamFiqxNkhO5nFON_uqYil103Z-zQMIQzIEXh4DnE7Xpz5yXQJhXPsAVyHieTdSzPyNnzGGx9ari6kSytoLtF2x4zRvZC1ammT5N9vHfYBQf/s320/Screen+Shot+2017-06-23+at+10.06.55+PM.png" style="width: 100%;" />
<br />
<h2>
List</h2>
</div>
</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, 2000); // Change image every 2 seconds
}
</script>
.mySlides {
display:none;
position: relative;
width: 100%; /* for IE 6 */
}
h2 {
position: absolute;
top: 10px;
left: 10px;
width: 100%;
}
</style>
<br />
<div class="w3-content w3-section" style="max-width: 200px;">
<div class="mySlides">
<img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEitnBbsu_bTLW70HJfkGPPhYHd1uy_oEMltHKThLYRR3Lo6DoFwBQF0MFHnYD-Gut8Udd4848KN8YC_vAfVh0ir_gWMOH4tJH4EGZpV3pzTk4lSzmsiADO85taMMw-B6rW_Ppo1VaKhPbub/s320/Screen+Shot+2017-06-23+at+9.53.26+PM.png" style="width: 100%;" />
<br />
<h2>
Set</h2>
</div>
<div class="mySlides">
<img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjQvf5RaHRdkYDb4WiZXrp3R7IVu78KdCbdyFWHtDT5ljeYHO57OE6gVQE0Zj0BUfgnnaGBXSdhgbeZWeQ4xBQsYDc-VgGFk3xa2IimQPtNZvezGI73IBAreEw516XZngY4gxBx9wCB1SbB/s320/Screen+Shot+2017-06-23+at+9.56.12+PM.png" style="width: 100%;" />
<br />
<h2>
SortedSet</h2>
</div>
<div class="mySlides">
<img src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjdL9x2_XqgV9PdPT4xsU-PnH67hr8YKUiEuamFiqxNkhO5nFON_uqYil103Z-zQMIQzIEXh4DnE7Xpz5yXQJhXPsAVyHieTdSzPyNnzGGx9ari6kSytoLtF2x4zRvZC1ammT5N9vHfYBQf/s320/Screen+Shot+2017-06-23+at+10.06.55+PM.png" style="width: 100%;" />
<br />
<h2>
List</h2>
</div>
</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, 2000); // Change image every 2 seconds
}
</script>