```
Note that `pos` is `0` in the beginning of the animation and `1` at the end of the animation.
-To make things easier for you a convenience method is passed as the second argument. This method accepts a from and to value and can be a number, unit or hex color:
+To make things easier a morphing function is passed as the second argument. This function accepts a `from` and `to` value as the first and second argument and they can be a number, unit or hex color:
```javascript
var ellipse = draw.ellipse(100, 100).attr('cx', '20%').fill('#333')