FIG. 1 is a front, side perspective view of a block assembly showing our new design;
FIG. 2 is another front, side perspective view thereof;
FIG. 3 is a rear, side perspective view thereof;
FIG. 4 is another rear, side perspective view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a left side view thereof;
FIG. 8 is a right side view thereof;
FIG. 9 is a top view thereof;
FIG. 10 is a perspective view of a first component thereof;
FIG. 11 is a perspective view of a second component thereof;
FIG. 12 is a perspective view of a third component thereof;
FIG. 13 is a perspective view of a fourth component thereof;
FIG. 14 is a perspective view of a fifth component thereof; and,
FIG. 15 shows front views of the components of FIGS. 10-14.
The bottom views of the block assembly and components thereof form no part of the claimed design.