The generator matrix

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

generates a code of length 59 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 50.

Homogenous weight enumerator: w(x)=1x^0+33x^50+72x^51+126x^52+132x^53+213x^54+244x^55+314x^56+398x^57+367x^58+422x^59+395x^60+346x^61+281x^62+230x^63+128x^64+118x^65+88x^66+42x^67+52x^68+26x^69+32x^70+14x^71+4x^72+4x^73+7x^74+3x^76+1x^78+1x^80+1x^82+1x^86

The gray image is a code over GF(2) with n=236, k=12 and d=100.
This code was found by Heurico 1.16 in 1.2 seconds.