The generator matrix

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

generates a code of length 20 over Z8 who´s minimum homogenous weight is 15.

Homogenous weight enumerator: w(x)=1x^0+122x^15+414x^16+586x^17+968x^18+1178x^19+1590x^20+1286x^21+1005x^22+550x^23+327x^24+110x^25+42x^26+6x^27+4x^28+2x^29+1x^30

The gray image is a code over GF(2) with n=80, k=13 and d=30.
This code was found by Heurico 1.16 in 0.414 seconds.