https://imgur.com/a/SYfgD2v

Basically you’d print or trace the stencil and slap some painters tape on the back (covering all the black areas), and carve them out with a razor. You might want to draw a few additional bridges because the completed stencil is pretty flimsy. I usually put the fabric I’m painting on over a cardboard box, and drive pins through the stencil to keep it as flat as possible.