The generator matrix

 1  0  0  0  1  1  1  2  1  0  4  6  1  1  1
 0  1  0  0  1  4  5  1  0  2  1  1  7  1  6
 0  0  1  0  1  5  2  3  2  1  3  6  6  7  7
 0  0  0  1  4  1  5  5  3  3  0  7  2  3  6

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

Homogenous weight enumerator: w(x)=1x^0+670x^12+1360x^14+1455x^16+560x^18+50x^20

The gray image is a code over GF(2) with n=60, k=12 and d=24.
This code was found by Heurico 1.11 in 82.2 seconds.