Three Stages of a Rose

I started an underpainting for a new flower painting. I guess I'm a glutton for punishment. After randomly laying them out, and starting the block-in, I realized that I had chosen three roses at varying degrees of blossoming. They are all white so the challenge will be to walk the whites across the painting with diminishing degrees of brightness. The metal creamer's just there for balance and because I think it's really cool looking. Happy Fourth of July!