Left to right

Day 3 and I've printed the third layer, a light green (mixed from process yellow and  phtalo blue). The image shows all three layers, the first being on the left, with yesterday's yellow layer in the centre. The printing process becomes more interesting now as each new layer of colour is influenced by the layers beneath. I've added an extender to the ink to increase its transparency. Any guesses as to what the image is yet?  It should become distinct by the time we get to layer five.