FIG. 1 is a perspective view of a building block;
FIG. 2 is a front elevation thereof;
FIG. 3 is a rear elevation thereof;
FIG. 4 is a left side elevation thereof;
FIG. 5 is a right side elevation thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a bottom view thereof; and
FIG. 8 is showing a front elevation view of a building block in a position of use.
FIG. 9 is showing another embodiment of a building block in a position of use.
FIG. 10 is showing the other embodiment of a building block in a position of use.
FIG. 11 is showing the other embodiment of a building block in a position of use.
FIG. 12 is showing the other embodiment of a building block in a position of use.
FIG. 13 is showing the other embodiment of a building block in a position of use.
FIG. 14 is showing the other embodiment of a building block in a position of use.
FIG. 15 is showing the other embodiment of a building block in a position of use.
FIG. 16 is showing the other embodiment of a building block in a position of use.
FIG. 17 is showing the other embodiment of a building block in a position of use.
FIG. 18 is showing the other embodiment of a building block in a position of use; and,
FIG. 19 is showing the other embodiment of a building block in a position of use.