I am writing a story. It is based on a modern theme and is a family story. But I want to write it in a jumbled up order of events. Something like the movie momento but in a lighter fashion. I forgot the name of this technique by which you tell the story by moving forward and backward. I started it off and made someone read a chapter. But a reader told me he wasn't able to understand/got confused by this method. So put the chapters in a possible order and the story looked dry. Is it montage? How can I use this technique effectively?