colour engraving on tiles depicting Darth Vader in a cinematic style

1 put two layers of white

2 put a layer of yellow on 2/3 of the tile 

3 put a layer of orange on top of the yellow

4 put a layer of red on the top right

5 put a layer of blue on the top left

6 cover everything with a layer of walnut

Don't forget to let it dry for 1 hour between each layer. 

don't forget to put the image in negative if it doesn't is not