The whole concept was about arrows, and the director wanted the arrows to be animated on a steppy path - not curved -
If you ever tried to do this, you'll know why i've made this tutorial.
A real pain in the head, I've searched for a plugin or a tutorial about the subject,and i found that many people had the same problem!!
I hope you find this tutorial useful, and sorry for my bad english and bad quality sound ,as this is my first ever tutorial..