ISO: Half-Moon Rice Cakes Question

I'm confused over the details of the Korean Half-Moon-Shaped Desert Recipe. In step two, are the chestnuts and the jujubes and the sesame and the sweet bean kept in four different bowls and each mixed into a seperate filling or are they all mixed together into one filling.....or do the sesame and bean go together making a total of three different fillings? If different fillings, is there any tradition that a certain type filling goes in a certain color dough? ----- Another question, Is this supposed to make just three BIG rice cakes, one green, one white, and one colored? Or does each color dough get divided into a certain number of or into certain size pieces which are filled and shaped individually?