Try this JS:

Qualtrics.SurveyEngine.addOnload(function () {
	this.hideNextButton();
});
Qualtrics.SurveyEngine.addOnReady(function () {
	const quest = this;
	const qc = quest.getQuestionContainer();

	//Add links to images here
	const imgLinks = [
		"https://iima.au1.qualtrics.com/ControlPanel/Graphic.php?IM=IM_cCQ21dgfJJU1JDT",
		"https://iima.au1.qualtrics.com/ControlPanel/Graphic.php?IM=IM_03uFE9bjTVeXlad",
		"https://iima.au1.qualtrics.com/ControlPanel/Graphic.php?IM=IM_9LTvOOtrgXEorQh",
		"https://iima.au1.qualtrics.com/ControlPanel/Graphic.php?IM=IM_9z9n5amvozfILqZ",
		"https://iima.au1.qualtrics.com/ControlPanel/Graphic.php?IM=IM_0jH3QAOZh6Av7Dv"
	];

	// How many images do you want to show?
	const numImages = 2;

	// Duration of the flash in ms
	const flashTime = 200;

	const images = [];

	for (let i = 0; i < numImages; i++) {
		const random = Math.floor(Math.random() * imgLinks.length);
		const img = imgLinks.splice(random, 1).pop();
		images.push(img);
	}

	const imageHTMLs = images.map((url, index) => {
		const html = '<div id="img_' + index + '" style="text-align: center;opacity:0"><img src="' + url + '" width="80%" style="margin: auto" /></div>';
		return html;
	});

	imageHTMLs.forEach((item) => {
		qc.insertAdjacentHTML("beforeend", item);
	});

	const allImages = Array.from(qc.querySelectorAll("img"));
	allImages.forEach((item) => {
		item.style.display = "none";
		item.parentElement.style.opacity = 1;
	});

	setTimeout(() => {
		const startTime = Date.now();
		for (let i = 0; i < allImages.length; i++) {
			const image = allImages[i];
			setTimeout(() => {
				image.style.display = "";
			}, i * flashTime);
			setTimeout(() => {
				image.style.display = "none";
			}, flashTime + i * flashTime);
		}
		setTimeout(() => {
			quest.clickNextButton();
		}, flashTime + allImages.length * flashTime);
	}, 500);
});

Demo: https://iima.au1.qualtrics.com/jfe/preview/previewId/00a1841e-33a5-49ae-a9c5-6934da853af4/SV_8HBDY4VRJnFn40J/BL_7OMuuVVOdTtgmma?Q_SurveyVersionID=current

This was very helpful, thank you! Do you know if this will record which image is selected? Or if I’m able to locate the URLs once data is collected? Or maybe there is an option for setting embedded data?