Designated dancers, working toward the Center of the Line, successively
do a Partner Trade with each dancer until reaching the far end of the
Line. Ripple
n means to Trade with a total of
n dancers.
n can include a fraction (e.g., Ripple 2 & 1/2 means to Partner Trade
with 2 successive dancers and then 1/2 Partner Trade with the third dancer).
EN: 20