Marmoleum "Rug" Design

This is the design for my Marmoleum "rug"/ floor cloth.  I made this design with Excel borders.

I ran an Excel macro that sets up a square grid.   I used format borders to put in the design lines and the color bucket for color.  Once I had a few squares done, I used the copy format tool to duplicate the design to other squares.

Then I copied the design into Paint and saved it as a JPG file.  I rotated the JPG file 45 degrees and "warmed" the JPG to change the colors a little.  .... the color is close to what I want.