The generator matrix

 1  0  1  1  1  0  1  1  4  1  1  1  4  2  2  2  1  0  1  1  1
 0  1  1  0  1  1  0  7  1  1  0  4  1  4  0  1  6  1  1  0  0
 0  0  2  0  0  0  0  0  0  6  2  2  4  2  6  4  4  2  0  0  0
 0  0  0  2  0  0  0  4  2  6  2  6  6  0  2  0  6  2  0  6  0
 0  0  0  0  2  0  0  6  2  4  6  0  0  2  6  0  4  6  4  0  0
 0  0  0  0  0  2  0  2  4  6  6  0  6  0  4  4  6  4  4  2  0
 0  0  0  0  0  0  2  2  6  4  4  6  2  2  0  6  4  6  6  0  0

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

Homogenous weight enumerator: w(x)=1x^0+54x^12+158x^13+344x^14+566x^15+1142x^16+2764x^17+4410x^18+7520x^19+10454x^20+10624x^21+10358x^22+7796x^23+4474x^24+2596x^25+1194x^26+608x^27+252x^28+114x^29+74x^30+22x^31+7x^32+4x^34

The gray image is a code over GF(2) with n=84, k=16 and d=24.
This code was found by Heurico 1.16 in 22 seconds.