I claim the ornamental design for a bed cover, as shown and described.
FIG. 1 is a perspective view of a bed cover showing my new design with a bed skirt drawn in broken line and positioned above to indicate a manner of assembly when in use;
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; and,
FIG. 7 is a bottom plan view thereof.
The broken lines showing a bed skirt in FIG. 1 and a central region of the bed cover depict environmental subject matter and form no part of the claimed design. The remaining broken lines represent a zipper and are part of the claimed design.