The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+32x^12+8x^13+144x^14+64x^15+222x^16+352x^17+220x^18+1472x^19+312x^20+2352x^21+456x^22+1472x^23+392x^24+352x^25+160x^26+64x^27+40x^28+8x^29+40x^30+25x^32+4x^34

The gray image is a code over GF(2) with n=84, k=13 and d=24.
This code was found by Heurico 1.16 in 0.42 seconds.