I am doing a painting right now and I want to put neon red over neon blue in kind of a streaked pattern. First, how can I make neon red and neon blue looking colors with Prussian Blue and Cadmium Red? Second, will those two colors combine into an ugly purple if I paint the red over the blue directly after I paint on the blue?

Here is an extremely rough rendition of the painting. I am planning on adding the blue and red to the large planet. The colors in the image are filling the entire area that they are placed in, it's just really hard to draw with a mouse. Tell me what you think of the design. The circles are actual circles in my painting.

http://s264.photobucket.com/albums/ii186/moonman130/?action=view&current=paintingrendition.jpg