The generator matrix

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

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+76x^24+132x^25+128x^26+608x^27+214x^28+836x^29+225x^30+792x^31+157x^32+540x^33+144x^34+128x^35+58x^36+28x^37+14x^38+8x^39+6x^40+1x^46

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 0.252 seconds.