Display screen or portion thereof with an animated graphical user interface

[0001]FIG. 1 is a front view of a first image in a sequence of a display screen or portion thereof with an animated graphical user interface;

[0002]FIG. 2 is a second image thereof;

[0003]FIG. 3 is a third image thereof;

[0004]FIG. 4 is a fourth image thereof;

[0005]FIG. 5 is a fifth image thereof;

[0006]FIG. 6 is a sixth image thereof;

[0007]FIG. 7 is a seventh image thereof;

[0008]FIG. 8 is an eighth image thereof; and,

[0009]FIG. 9 is a ninth image thereof.

[0010]The dotted lines shown in FIGS. 1, 2, 3, 4, 5, 6, 7, 8, and 9, do form a part of the display.

[0011]The broken lines shown in the drawings illustrate portions of the display screen or portion thereof with an animated graphical user interface that form no part of the claimed design. The appearance of the display screen or portion thereof with animated user interface transitions sequentially between the views shown in FIGS. 1, 2, 3, 4, 5, 6, 7, 8, and 9 respectively. The process or period in which one views transitions to another forms no part of the claimed design.