The generator matrix

 1  0  1  1  1  6  1  1  0  1  1  6  1  1  0  1  0  1  2  2  1
 0  1  3  6  1  1  0  3  1  6  5  1  0  3  1  0  1  3  0  0  0
 0  0  4  0  0  0  0  0  0  0  0  0  4  0  4  4  4  4  0  0  0
 0  0  0  4  0  0  0  0  0  0  0  0  4  4  4  4  0  0  4  0  0
 0  0  0  0  4  0  0  0  0  0  0  4  0  4  0  4  0  4  4  0  0
 0  0  0  0  0  4  0  0  0  0  4  4  4  0  0  4  0  4  0  0  0
 0  0  0  0  0  0  4  0  0  0  4  0  4  0  4  0  4  4  4  4  0
 0  0  0  0  0  0  0  4  0  0  0  4  0  4  4  4  4  4  0  4  0
 0  0  0  0  0  0  0  0  4  0  4  4  4  4  0  0  4  4  0  4  0
 0  0  0  0  0  0  0  0  0  4  4  0  0  4  4  4  4  0  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+76x^12+16x^13+60x^14+470x^16+832x^17+500x^18+2560x^19+928x^20+5472x^21+944x^22+2560x^23+520x^24+832x^25+480x^26+52x^28+16x^29+52x^30+1x^32+12x^34

The gray image is a code over GF(2) with n=84, k=14 and d=24.
This code was found by Heurico 1.16 in 0.979 seconds.