The generator matrix

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

generates a code of length 8 over Z8 who´s minimum homogenous weight is 4.

Homogenous weight enumerator: w(x)=1x^0+18x^4+40x^6+138x^8+40x^10+18x^12+1x^16

The gray image is a code over GF(2) with n=32, k=8 and d=8.
This code was found by Heurico 1.16 in 0.000323 seconds.