Display Screen or Portion Thereof with an Animated Graphical User Interface

FIG. 1 is a front view of a first image of a display screen or portion thereof with an animated graphical user interface;

FIG. 2 is a front view of a second image thereof;

FIG. 3 is a front view of a third image thereof;

FIG. 4 is a front view of a first image of a second embodiment thereof;

FIG. 5 is a front view of a second image thereof; and,

FIG. 6 is a front view of a third image thereof.

The appearance of the image transitions sequentially between the images shown in FIGS. 1 - 3 and FIGS. 4 - 6 . The process or period in which an image transitions to another forms no part of the claimed design.

The outer broken lines show the display screen or portion thereof and form no part of the claimed design. The remaining broken lines show parts of the animated graphical user interface and form no part of the claimed design.