The stl file attached is for printing the Nintendo 64 logo but if you are looking for an easy way to design your own initials in the same manner as the N64 Logo I posted a video how to. It was designed in the free modeling software onshape that works in a browser so give it a try.

Check out https://www.makerlessons.com/the-academy/onshape/3d-print-projects for more 3D prints or if you want to learn more about how to design in onshape check out https://www.makerlessons.com/the-academy/onshape

~GLHF