Fix interval bug

src/routes/+page.svelte

@@ -145,6 +145,11 @@
 		if (controlsEl) {
 			controlsEl.appendChild(div);
 			isOutputControlAdded = true;
+			(controlsEl as HTMLElement).onclick = () => {
+				if (interval) {
+					clearInterval(interval);
+				}
+			}
 		}
 	}