Everything turns around the still point; the still point never moves. Movement is the character of each piece's motion — built purely from rotation and center-locked scale, so k-fold symmetry holds at every instant and the center never drifts. Tempo (Slow / Medium / Fast) sets its pace, and Intensity (Mild / Moderate / Severe) how hard it breathes, shakes or surges. Examples below are shown at Medium tempo, Moderate intensity.