Here is a file for a heart edged square by request. This file matches the borders here and was designed to be cut as close to 12×12 as your cutter will allow, but feel free to cut it as small as your cutter can handle.
The download is a zip file with a single layer svg file for use with any version of SCAL and a DXF file.
My files are for personal use only. Feel free to link to this post, but the files are not to be shared or distributed in any way.
Download the files here.