The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  2  1  1  0  1  2  1  1  1
 0  2  0  0  0  0  0  0  0  2  2  4  2  4  0  2  6  4  0  4  0
 0  0  2  0  0  0  0  4  6  2  6  6  2  2  2  0  6  0  2  0  0
 0  0  0  2  0  0  0  6  6  4  4  2  2  6  4  6  4  4  6  2  0
 0  0  0  0  2  0  0  2  0  0  2  4  6  2  6  4  4  0  0  4  0
 0  0  0  0  0  2  0  2  4  2  6  2  2  4  6  0  2  4  4  2  0
 0  0  0  0  0  0  2  2  4  2  0  0  6  4  2  2  0  2  6  2  0

generates a code of length 21 over Z8 who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+59x^12+136x^13+258x^14+504x^15+627x^16+910x^17+1552x^18+3050x^19+5701x^20+7086x^21+5682x^22+3194x^23+1556x^24+954x^25+646x^26+398x^27+239x^28+130x^29+52x^30+22x^31+8x^32+2x^34+1x^36

The gray image is a code over GF(2) with n=84, k=15 and d=24.
This code was found by Heurico 1.16 in 7.88 seconds.