FIG. 1 is a front elevation view of a first embodiment of a shed panel, showing my new design; FIG. 2 is a rear elevation view of the first embodiment; FIG. 3 is a left side elevation view of the first embodiment; FIG. 4 is a right side elevation view of the first embodiment; FIG. 5 is a top plan view of the first embodiment; and, FIG. 6 is a top perspective view of the first embodiment.