Hidden Alphabet Illusion

Designed this plate using blender, some letters might be not so straight forward and this is to maintain the square module in the plate, avoided diagonal and curvy lines as this made the plate a bit readable without the viewer bar.
I printed using two colors, the plate can for sure be printed using one color and then painted, the viewer bar shall match the negative characters color as shown in the pictures
I used 5% fill density, no supports and no Brim.
Printed using PLA on an ender 3 max using prusaslicer.