Self-made graphic, converted from a version of the following vector PostScript source code:

%!
306 396 translate 2.5 dup scale
0 100 moveto 100 -100 lineto
-100 0 lineto 100 100 lineto
0 -100 lineto -100 100 lineto
100 0 lineto -100 -100 lineto
closepath gsave 14.97125
setlinewidth stroke grestore
7.4535625 setlinewidth .92 .96
1 setrgbcolor stroke
gsave 4{14.97125 setlinewidth 0 setgray
44 12 moveto 56 -12 lineto stroke
15 42.5 moveto 51 24.5 lineto stroke
64 28 moveto 57.6 14.8 lineto stroke
7.4535625 setlinewidth .92 .96 1 setrgbcolor
43 14 moveto 57 -14 lineto stroke
13.6 43.2 moveto 51.6 24.2 lineto stroke
65 30 moveto 56.7 13.4 lineto stroke
90 rotate}repeat grestore
gsave 4{14.97125 setlinewidth 0 setgray
16.5 67 moveto 23.2 53.6 lineto stroke
7.4535625 setlinewidth .92 .96 1 setrgbcolor
15.5 69 moveto 23.8 52.4 lineto stroke
90 rotate}repeat grestore showpage
%EOF