var curtime = new Date().getTime();
var arrayimg = ["https://www.learningcontainer.com/wp-content/uploads/2020/07/Sample-JPEG-Image-File-Download.jpg?" + curtime, "https://upload.wikimedia.org/wikipedia/en/9/95/Test_image.jpg?" + curtime, "https://testimages.org/img/testimages_screenshot.jpg?" + curtime];
var arrayimgLoad = [1, 1, 1];
var arrayimgOLD = ["", "", ""];
var myVar = setInterval(function() {
  myTimer()
}, 1000);

function myTimer() {
  arrayimg.forEach(imageupdate);
}

function imageupdate(element, index, array) {
  imgname = "img" + index;
  if (arrayimgLoad[index] == 1) {
    arrayimgOLD[index] = document.getElementById(imgname).src;
    document.getElementById(imgname).src = element + new Date().getTime();
    loadImage(document.getElementById(imgname).src, index);
  }
}
async function loadImage(imageUrl, asindex) {
  arrayimgLoad[asindex] = 0;
  let img;
  const imageLoadPromise = new Promise(resolve => {
    img = new Image();
    img.onload = resolve;
    img.src = imageUrl;
  });
  await imageLoadPromise;
  arrayimgLoad[asindex] = 1;
  console.log("Image " + asindex + " Loaded");
  return img;
}

<img src="" id='img0' width="30%" height="30%" />
<img src="" id='img1' width="30%" height="30%" />
<img src="" id='img2' width="30%" height="30%" />