The ornamental design for a wallpaper with pattern, as shown.
The patent or application file contains at least one drawing executed in color. Copies of the patent application publication with color drawings will be provided by the Office upon request and payment of the necessary file.
FIG. 1 is a top plan view of a first embodiment of a wallpaper with pattern according to my new design; and,
FIG. 2 is a top plan view of a second embodiment of a wallpaper with pattern.