The generator matrix

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

generates a code of length 24 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 20.

Homogenous weight enumerator: w(x)=1x^0+50x^20+32x^22+360x^24+32x^26+21x^28+15x^32+1x^44

The gray image is a code over GF(2) with n=96, k=9 and d=40.
This code was found by Heurico 1.16 in 2.35 seconds.