The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  X  X  2  1  1  1  1  X  1  X  1  1  1  X
 0  2  0  0  0  0  0  0  0  0  2  2  0  0  0  2  0  0  2  2  0  0  2  2  2  2  2  0  2  0  0
 0  0  2  0  0  0  0  0  0  2  2  2  0  2  2  0  0  2  2  0  0  2  2  2  2  0  0  0  0  0  0
 0  0  0  2  0  0  0  0  0  2  0  2  2  2  0  2  2  2  0  0  0  0  0  2  2  2  0  2  2  0  2
 0  0  0  0  2  0  0  0  2  0  0  2  2  0  2  2  0  2  0  2  0  2  0  0  0  2  0  2  0  2  0
 0  0  0  0  0  2  0  0  2  0  2  0  0  2  2  2  2  2  0  0  0  0  2  2  0  0  2  0  2  0  0
 0  0  0  0  0  0  2  0  2  2  2  0  0  0  2  2  2  2  2  2  2  2  0  0  2  0  0  2  0  2  2
 0  0  0  0  0  0  0  2  2  2  0  0  2  2  2  0  2  0  2  0  2  0  0  0  0  2  2  0  0  2  0

generates a code of length 31 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 24.

Homogenous weight enumerator: w(x)=1x^0+44x^24+16x^26+124x^28+320x^30+381x^32+48x^34+64x^36+20x^40+4x^44+2x^48

The gray image is a code over GF(2) with n=124, k=10 and d=48.
This code was found by Heurico 1.16 in 0.0456 seconds.