An Dro
The dancers link little fingers in a long line, swinging their arms, and moving to their left by taking longer steps in that direction than when stepping right. In the generic case the arm movements consist first of two circular motions going up and back (at about chest level) followed by one in the opposite direction (down then front); these are done quite close to the body.
This is then followed by a circle in the same sense as the last (down then front) but with full arm extension and extending behind the body. The cycle then repeats.