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 of the display screen or portion thereof with the animated graphical user interface.

FIG. 3 is a front view of a third image of the display screen or portion thereof with the animated graphical user interface.

FIG. 4 is a front view of a fourth image of the display screen or portion thereof with the animated graphical user interface; and,

FIG. 5 is a front view of a fifth image of the display screen or portion thereof with the animated graphical user interface.

The broken line outline of a mobile device illustrates environmental structure of a display screen or portion thereof and forms no part of the claimed design. The dot-dash broken lines showing a display screen illustrate a boundary and form no part of the claimed design. All other broken lines in the drawings depict portions of a graphical user interface that form no part of the claimed design.

The appearance of a transitional image sequentially transitions between the images shown in FIGS. 1 - 5 . The process or period in which one image transitions to another image forms no part of the claimed design.