My sons and I are big fans of the movie "Forbidden Planet" and recently went to see it in an old single-screen movie theater. I made the hats to wear at that event.
There are two versions of the STL file. One is an insignia that is all one height. This can be painted after printing if desired, The other is for printing with 3 colors of filament. You don't need an automatic color changer, just set a pause for color change on layers 6 and 15. Start with black, switch to silver, and lastly to red.