add mask

src/mask.js

@@ -0,0 +1,20 @@
+import Icons from './icons';
+
+export default class Mask {
+  constructor(art) {
+    this.art = art;
+    this.init();
+  }
+
+  init() {
+    this.art.refs.$mask.appendChild(Icons.play);
+  }
+
+  show() {
+    this.art.refs.$mask.style.display = 'flex';
+  }
+
+  hide() {
+    this.art.refs.$mask.style.display = 'none';
+  }
+}