Full Form:

• The nondominant hand is open with the palm facing up
• The dominant hand is in a flat "O", palm facing up
• Move the dominant hand up and down on top of the nondominant hand

*Simplified Form:

• The nondominant hand is open with the palm facing up
• The dominant hand uses the same handshape
• The dominant hand moves up and down on top of the nondominant hand

*shown in video