The boxes in The Honost Whore

In Act 2, scene 1, the description is more vivid compared to other scenes. When Roger enters, he places a number of objects down on the table. The way it is read, it appears that great care is being taken with the objects and that Roger places "all things in order". This image jumps out as there is a constant contrast of white and red--I assume portraying blood--but is there a meaning behind the white and red boxes. I did not recall a reference to them further along in the text, but each item is very carefully placed and described by the author.