The generator matrix

 1  0  1  1  1  6  1  1  0  1  1  1  1  6  1
 0  1  3  6  5  1  0  3  1  6  0  4  5  1  0
 0  0  4  0  4  0  0  4  0  0  4  4  0  4  0
 0  0  0  4  4  4  4  4  4  0  4  0  0  4  0

generates a code of length 15 over Z8 who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+18x^12+48x^13+13x^14+96x^15+13x^16+48x^17+16x^18+3x^22

The gray image is a code over GF(2) with n=60, k=8 and d=24.
This code was found by Heurico 1.16 in 0.0016 seconds.