The ornamental design for a displayscreen with an animated graphical user interface, as shown and described.
FIG. 1 is a front view of a first image in a sequence for a first embodiment of a display screen with an animated graphical user interface showing our new design; and
FIG. 2 is a second image thereof.
FIG. 3 is a front view of a first image in a sequence for a second embodiment of a display screen with an animated graphical user interface showing our new design; and,
FIG. 4 is a second image thereof.
The broken line showing of a display screen with animated graphical user interface is included for the purpose of showing portions of the article that form no part of the claimed design. The appearance of the transitional image sequentially transitions between the images shown in FIGS. 1 and 2 and FIGS. 3 and 4. The process or period in which one image transitions to another image forms no part of the claimed design.