The design came from an online image licensed for reuse with modification. This image can be found at: https://pixabay.com/p-365850/?no_redirect . I then used inkscape software to trace a path and exported it as a .dxf file. The file was imported using Openscad software, extruded 2 mm, and a 2 mm cylinder was added beneath it for the base of the coaster. The design was exported and printed with a 25% infill using PLA filament.