Actually this is a rather poor execution of the technique of revealing path strokes. there are many ways to achieve this effects and they all involve drawing paths on top of the text and revealing them through effects. you are looking for a recipe and there are many:
you will be better off listening and watching through a tutorial to get the exact method. if you have problem executing the technique then here is the place to figure out what went wrong.
Thank you very much
tried to find tutorials whole day. wrong keywords i guess.
thank you again
happened to me many times. Good luck!