Create app.css

app.css

@@ -0,0 +1,19 @@
+<style>
+    #output {
+      font-size: 20px;
+      margin-top: 20px;
+    }
+    .red {
+      color: red;
+    }
+    .yellow {
+      color: yellow;
+    }
+    .green {
+      color: green;
+    }
+    video {
+      width: 100%;
+      height: auto;
+    }
+  </style>