2022 Tucson SEL USA speedometer question

I have the Tucson SEL with the standard analog speedometer/tach equipment. It also has a digital speedometer in the information center. When standing still there is an illuminated blue lit line at the bottom of the zero mph. As I accelerate my speed the blue line will move downward in a sequential motion and then return to its starting position under the mph number. It keeps repeating this motion until I stop the movement of the vehicle then the blue line is motionless again.
It doesn't serve any purpose except for maybe aesthetic reasons.
Is this normal?