hover for circles

public/css/app.css

@@ -1,3 +1,13 @@
 svg {
 	border: 1px solid black;
 }
+
+svg circle {
+	transition: all 1s ease-in-out;
+	transform-origin: 50% 50%;
+}
+
+circle:hover {
+	fill:blue;
+	transform: scale(2);
+}