Display Screen or Portion Thereof with an Animated Graphical User Interface

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

FIG. 2 is a top view of the display screen of FIG. 1 showing a second image thereof of my new design;

FIG. 3 is a top view of the display screen of FIG. 1 showing a third image thereof of my new design; and,

FIG. 4 is a top view of the display screen of FIG. 1 showing a fourth image thereof of my new design.

The appearance of the graphical user interface sequentially transitions between the images shown in FIGS. 1 - 4 . The process or period in which one image transitions to another image forms no part of the claimed design.

The broken lines showing a pressure calibration device illustrate environmental subject matter and form no part of the claimed design. The outermost solid line rectangle illustrates the display screen and it is part of the claimed design. The remaining broken lines illustrating portion of the graphical user interface form no part of the claimed design.