Update scroll bar

Author: jcs090218

src/index.css

@@ -11,3 +11,23 @@ code {
   font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
     monospace;
 }
+
+/* Scrollbar */
+
+::-webkit-scrollbar {
+  border: 2px solid rgb(255, 255, 255);
+  width: 10px;
+}
+
+::-webkit-scrollbar-track {
+  background: #333333;
+}
+
+::-webkit-scrollbar-thumb {
+  background: #848484;
+  border-radius: 5px;
+}
+
+::-webkit-scrollbar-thumb:hover {
+  background: #CECECE;
+}