Create a Halftone Square

I am a screen printer. Trying to blend 2 colors of ink in a perfect square so that I can print 2 different ink color halftones on film, burn screen and print. I am having trouble because the tools I am seeing show color blend transitions. Gradients from one color to another vertically, horizontally, conical etc. I hope that I am just not seeing the correct button for a uniform square halftone. Please let me know if I am not making any sense at all!!! Thank you for any coaching!