move all music data to struct, save this data now

src/polygon_draw.rs

@@ -42,6 +42,13 @@ impl PolygonFrame {
             poly.update();
         }
     }
+
+    pub fn default() -> PolygonFrame {
+        PolygonFrame {
+            teta: 0.0,
+            polygons: vec![],
+        }
+    }
 }
 
 impl<Message> canvas::Program<Message> for PolygonFrame {