Walls for inversed color version

Image paths fixed;
Wall in the back added;
Gaps between the walls fixed
Revert "Walls for inversed color version"

This reverts commit 88ad786f6aa8ff692c99b7866f7662f3543544e2.
Revert "Revert "Walls for inversed color version""

This reverts commit 481d654260fedb16ce98afcfb776c45b70b07d8e.