The ornamental design for an displayscreen with an animated avatar, as shown and described.
FIG. 1 is a front view of the first image in the sequence for a display screen with an animated avatar showing our new design;
FIG. 2 is a front view of the second image thereof;
FIG. 3 is a front view of the third image thereof;
FIG. 4 is a front view of the fourth image thereof;
FIG. 5 is a front view of the fifth image thereof;
FIG. 6 is a front view of the sixth image thereof;
FIG. 7 is a front view of the seventh image thereof;
FIG. 8 is a front view of the eighth image thereof;
FIG. 9 is a front view of the ninth image thereof; and,
FIG. 10 is a front view of the tenth image thereof.
The appearance of the animated avatar sequentially transitions between the images shown in FIGS. 1-10. The process or period in which one image transitions to another forms no part of the claimed design. The broken line showings of a portion of the display screen, seat backs, and portions of the avatar are for the purpose of illustrating unclaimed portions of the display screen with an animated avatar and form no part of the claimed design.