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  X  1  1  1  1  1  1  1  1  X  1  1  1  1  1  1
 0  X  0  0  0  0  0  X  X  X 4X 4X 4X 3X 2X 4X  0 3X  X 3X 3X  X  0 2X  X 3X 2X  X  X 3X  X 4X 4X  X 4X  0 3X 2X  0  0
 0  0  X  0  0  X  X 3X 4X 2X 2X 3X 4X 2X 2X  X 2X 4X  0 2X 3X  X  X 2X 3X 4X  0 2X  X 4X  0 3X  0 4X  0 3X 4X  0 4X 4X
 0  0  0  X  0 3X 2X 3X  X 4X  0 3X  X 2X  X  0 3X  X 2X 4X  X 2X  X 2X 4X 2X  X  X 3X 4X 4X  X 4X 4X  0  X 4X 2X 2X  X
 0  0  0  0  X 3X  X 4X 3X 3X 3X 3X 4X  0 4X 2X  0 4X 4X 3X  0 2X  0 3X  X  0  0  X 4X 3X 3X  0  X 4X 3X 2X 4X 4X 4X  X

generates a code of length 40 over Z5[X]/(X^2) who´s minimum homogenous weight is 140.

Homogenous weight enumerator: w(x)=1x^0+168x^140+408x^145+412x^150+500x^152+468x^155+4000x^157+388x^160+8000x^162+392x^165+312x^170+252x^175+192x^180+112x^185+20x^190

The gray image is a linear code over GF(5) with n=200, k=6 and d=140.
This code was found by Heurico 1.16 in 0.596 seconds.