Update README.md

README.md

@@ -16,3 +16,18 @@ The project can be found on [https://gniludio.github.io/thependel/](https://gnil
 | `1-9` | Toggles the settings. |
 | `Esc` | Closes the settings. |
 | `Spacebar` | Pause / Unpause |
+
+## Future Ideas
+
+### Fading Out
+It would be very appealing if each pendulum has an additional fade duration after which the drawn line disappears. I tried to make that work through several ways, but found no satisfactory solution.
+
+
+1. clear canvas and redraw everything which didn't fade out
+    * very slow
+2. clear canvas and redraw everything through `bezierCurve` in big steps (e.g. 45°)
+    * a lot faster than 1. (still very unefficient)
+    * redrawing doesn't result in the same image
+3. [fabric.js](http://fabricjs.com/)
+    * tried with Polylines and with grouped Lines
+    * both too slow