repeats created in #SymmetryMill from 2 simple lines

Pattern preview:
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Copyright type: Creative Commons Attribution License
Copyright © 2012 by Elaine Polvinen. Permission is hereby granted to use, copy, modify, publish, and distribute these patterns under the terms of the Creative Commons Attribution License.
Direct link to the first pattern tile: (use according to license)
/share/tile/154a48dacf1f2e1
Source image credits:
Elaine Polvinen