animating text in keynote not in order
The short answer to your question is no, Keynote does not allow you to specify which order a line can be animated so that you would be able to achieve the effect you are going for. 

Annoyingly, the way to achieve this effect is to have separate object groups for each part that you want to animate. The gif below was generated in Keynote but it used multiple objects, if this is the desired visualisation you want, you will have to create each object to animate them individually.