JSFiddle - React, Tailwind, and code Playground
HTML
<img src="http://rako-apk.ru/design/test1.jpg" width="100%" border="0" alt="" id="bannerI">
JavaScript
var numB = 0;
function CNumber() {
if (numB < 4) {
numB = numB+1;
var myNumber= 'http://rako-apk.ru/design/test' + numB + '.jpg';
document.getElementById('bannerI').src=myNumber;
}
else {
numB = 0;
}
}
setInterval(CNumber, 1000);