I found this pattern on Atomm and add a small twist that you cut an extra set of straps. This will give it a 3D feel on either side of the earring.
Load the file into XCS and make sure that the settings are correct for your machine and wood.
Take the two of the strap pieces and glue them together. Do the same thing for the other two strap pieces.
Glue the straps back into the flip flop so a little bit hangs out either side. This gives a little dimension to the project.
Put on your preferred earring hardware and wear to the beach