The script itself predates the modern concept of copyright, and the creator of this image has released (or hereby releases) into the public domain any copyright generated by the making of the file (and grants an unconditional license to anyone, for any jurisdictions in which public-domain release is not legal). This applies internationally and for any purpose.
This image of
simple geometry
is
ineligible for
copyright
and therefore in the
public domain
, because it consists entirely of information that is common property and contains no original authorship.