The generator matrix

 1  0  1  1  1 X+2  1  1  0  1  1 X+2  1  1  0 X+2  1  1  0  1  1  0  1 X+2  1  1 X+2 X+2  1  X
 0  1 X+1 X+2  1  1  0 X+1  1 X+2  3  1  0 X+1  1  1 X+2  3  1  0 X+1  1  3  1 X+2 X+1  1  1 X+2 X+2
 0  0  2  0  0  0  0  0  0  0  0  0  0  2  2  2  2  2  2  2  2  0  2  0  2  2  0  0  2  2
 0  0  0  2  0  0  0  0  0  0  2  2  2  2  2  2  2  2  0  0  0  0  0  2  2  0  0  0  0  2
 0  0  0  0  2  0  0  0  0  2  2  2  0  2  2  2  0  0  2  2  0  2  0  2  2  2  0  2  0  0
 0  0  0  0  0  2  0  0  2  2  0  2  0  0  2  0  2  2  2  0  2  2  0  2  0  0  2  0  0  0
 0  0  0  0  0  0  2  0  2  0  0  2  2  0  0  2  2  0  2  2  0  0  0  0  2  2  2  0  0  2
 0  0  0  0  0  0  0  2  2  2  2  0  0  0  0  2  2  2  2  0  0  2  2  2  2  2  0  0  0  2

generates a code of length 30 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 24.

Homogenous weight enumerator: w(x)=1x^0+133x^24+48x^25+230x^26+240x^27+595x^28+480x^29+670x^30+480x^31+571x^32+240x^33+242x^34+48x^35+84x^36+10x^38+23x^40+1x^44

The gray image is a code over GF(2) with n=120, k=12 and d=48.
This code was found by Heurico 1.16 in 3.71 seconds.