const controls = document.querySelector(".controls");
const song = document.querySelector("iframe.song").contentWindow;

var scroll;
function pageScroll() {
	song.scrollBy(0, 1);
	scroll = setTimeout(pageScroll, 80);
}

document.querySelector("#autoscroll").addEventListener("click", function() {
	if (this.classList.contains("active")) {
		clearTimeout(scroll);
	} else {
		pageScroll();
	}
	this.classList.toggle("active");
});

// Display the controls on JS-enabled browsers
window.addEventListener("load", () => controls.classList.remove = "hidden");