File:Celtic-knot-insquare-green-transparentbg.png

Decorative Celtic or pseudo-Celtic knot which fits within a square.

Self-made, declared to be in public domain, generated from the following PostScript source code:

%!
306 326 translate /y{gsave 54 setlinewidth .92 .96 1 setrgbcolor
stroke grestore gsave 42 setlinewidth 0 setgray}def/x 15.6434465
def/w 10.60519935 def /m{moveto}def/l{lineto}def 1 setlinejoin
54 setlinewidth .92 .96 1 setrgbcolor -160 -200 m -200 -200 l
200 200 l 160 200 l stroke -159 200 m -200 200 l 200 -200 l 159
-200 l stroke 0 setlinejoin 17.5 setlinewidth .2 .8 .2
setrgbcolor 180 200 m 100 x add 100 x add 100 x sub 90 270 arc 0
0 170 w 180 w sub arc 100 x add neg 100 x add 100 x sub 270 90
arc -180 200 l y stroke grestore stroke 180 -200 m 100 x add 100
x add neg 100 x sub 270 90 arcn 0 0 170 360 w sub 180 w add arcn
100 x add neg 100 x add neg 100 x sub 90 270 arcn -180 -200 l y
stroke grestore stroke gsave 1 setlinejoin -160 -200 m -200 -200
l 200 200 l 160 200 l 42 setlinewidth 0 setgray stroke -159 -200
m -200 -200 l 200 200 l 159 200 l 17.5 setlinewidth .2 .8 .2
setrgbcolor stroke -160 200 m -200 200 l 200 -200 l 160 -200 l
42 setlinewidth 0 setgray stroke -159 200 m -200 200 l 200 -200
l 159 -200 l 17.5 setlinewidth .2 .8 .2 setrgbcolor stroke
grestore 6 setlinewidth .92 .96 1 setrgbcolor 0 0 194 w neg -2.5
arc stroke 0 0 194 2.5 w arc stroke 0 0 194 180 w sub 177.5 arc
stroke 0 0 194 182.5 180 w add arc stroke 12.25 setlinewidth 0
setgray 0 0 184.875 w neg -4 arc stroke 0 0 184.875 4 w arc
stroke 0 0 184.875 180 w sub 176 arc stroke 0 0 184.875 184 180
w add arc stroke y 100 x add neg 100 x add 100 x sub 271 -1 arc
stroke 100 x add 100 x add neg 100 x sub 179 91 arcn stroke 0 0
170 31 59 arc stroke 0 0 170 211 239 arc stroke 0 0 170 91 119
arc stroke 0 0 170 271 299 arc stroke 100 x add neg 100 x add
neg 100 x sub -89 -1 arc stroke 100 x add 100 x add 100 x sub 91
179 arc stroke grestore .2 .8 .2 setrgbcolor 17.5 setlinewidth
100 x add neg 100 x add 100 x sub 270 0 arc stroke 100 x add 100
x add neg 100 x sub 180 90 arcn stroke 0 0 170 30 60 arc stroke
0 0 170 210 240 arc stroke 0 0 170 90 120 arc stroke 0 0 170 270
300 arc stroke 100 x add neg 100 x add neg 100 x sub -90 0 arc
stroke 100 x add 100 x add 100 x sub 90 180 arc stroke showpage
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(Note, image does not actually have transparent background; for the origin of the name, see http://commons.wikimedia.org/wiki/File:Celtic-knot-insquare-green-transparentbg.svg