Display Screen or Portion Thereof with an Animated Graphical User Interface

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

FIG. 2 is a front view of a display screen or portion thereof with an animated graphical user interface showing a second image;

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

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

FIG. 5 is a front view of the display screen or portion thereof with the animated graphical user interface showing a fifth image. The appearance of the animated graphical user interface sequentially transitions from FIG. 1 to FIG. 5 . The process or period in which a figure transitions to another figure forms no part of the claimed design.

The dot-dashed broken lines depict the display screen or portion thereof and form no part of the claimed design. The dashed broken lines depict portions of the display screen or portion thereof with an animated graphical user interface that form no part of the claimed design.