The generator matrix

 1  1  1  1  1  1
 0  4  0  0  0  4
 0  0  4  0  0  4
 0  0  0  4  0  4
 0  0  0  0  4  4

generates a code of length 6 over Z8 who´s minimum homogenous weight is 4.

Homogenous weight enumerator: w(x)=1x^0+15x^4+96x^6+15x^8+1x^12

The gray image is a code over GF(2) with n=24, k=7 and d=8.
This code was found by Heurico 1.16 in 0.000134 seconds.