terminal.print({iframe: `
	<style>
		html, body {
			padding: 0;
			margin: 0;
			overflow: hidden;
		}
	</style>
	<!-- 1. The <iframe> (and video player) will replace this <div> tag. -->
	<div id="player"></div>

	<script>
		// 2. This code loads the IFrame Player API code asynchronously.
		var tag = document.createElement('script');

		tag.src = "https://www.youtube.com/iframe_api";
		var firstScriptTag = document.getElementsByTagName('script')[0];
		firstScriptTag.parentNode.insertBefore(tag, firstScriptTag);

		// 3. This function creates an <iframe> (and YouTube player)
		//    after the API code downloads.
		var player;
		function onYouTubeIframeAPIReady() {
			player = new YT.Player('player', {
				height: '390',
				width: '640',
				videoId: 'M7lc1UVf-VE',
				events: {
					'onReady': onPlayerReady,
					'onStateChange': onPlayerStateChange
				}
			});
		}

		// 4. The API will call this function when the video player is ready.
		function onPlayerReady(event) {
			event.target.playVideo();
		}

		// 5. The API calls this function when the player's state changes.
		//    The function indicates that when playing a video (state=1),
		//    the player should play for six seconds and then stop.
		var done = false;
		function onPlayerStateChange(event) {
			parent.postMessage({
				state: event.data,
				url: event.target.getVideoUrl(),
			}, "*");
			if (event.data == YT.PlayerState.PLAYING && !done) {
				setTimeout(stopVideo, 6000);
				done = true;
			}
		}
		function stopVideo() {
			player.stopVideo();
		}
	</script>
`, width: 640, height: 390, style: "padding: 0; margin: 0; border: 0"});

terminal.print("hi");
core.register("onWindowMessage", function(event) {
	terminal.print("message", JSON.stringify(event.message));
});