Two trefoil knots (with three internal self-crossings each), shaped somewhat like valknut symbols, mutually interlaced in an ornate way, so that there are 30 total crossings in the overall structure.  According to the color-coding in the image, there are three crossings of red over red, three blue-over-blue, 12 red-over-blue, and 12 blue-over-red.
Converted from the following PostScript vector source:

%!
306 396 translate 1 setlinejoin
/A 100 3 div def/B 10000 3 div sqrt def
/G{gsave fg fill grestore stroke}def
/D 39 3 sqrt div def
/C{A 5 mul neg B 3 mul moveto
A 5 mul B 3 mul lineto
A 2 mul neg B 4 mul neg lineto
A 7 mul neg B lineto
A 7 mul B lineto
A 2 mul B 4 mul neg lineto
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C 1 0 0 setrgbcolor stroke
gsave 180 rotate 0 setgray
C 0 0 1 setrgbcolor stroke grestore
/fg{1 0 0 setrgbcolor}def 0 setgray
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A 2 mul D add neg 0 rlineto
D neg -39 rlineto closepath G}def
A 3 mul neg B E A B E A neg B 3 mul E
/F{19.5 add moveto
A 2 mul D add neg 0 rlineto
D neg -39 rlineto
A 2 mul D add 0 rlineto G}def
A 6 mul D add B F
A 4 mul D add B 3 mul F
/H{moveto A B neg rlineto
D 2 div -19.5 rlineto
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A 6 mul neg 39 H
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G}def A 2 mul neg 39 I
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D neg 39 rlineto A B rlineto
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A neg B neg rlineto closepath G}def
A 5 mul J A J
/K{D 1.5 mul sub B 3 mul neg 19.5 sub
moveto A B rlineto D 2 div 19.5 rlineto
D -39 rlineto A neg B neg rlineto
D 2 div neg -19.5 rlineto G}def
A neg K A 3 mul K
/fg{0 0 1 setrgbcolor}def
A 3 mul neg J A 3 mul B neg E
0 B 2 mul 39 add I showpage
%EOF
AnonMoos