Building block

Description

FIG. 1 is a perspective view of a building block showing my design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is another perspective view of a building block showing my design.

The broken lines are for the purpose of illustrating portions of the building block that form no part of the claimed design.

Claims

The ornamental design for a building block, as shown and described.