.const-btn{
width:100%;
margin: 5px 0;
}

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(“homeimageswap”);
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";
}