dashed lines concentric, radial circles. periodic, segmented lines with gaps. bits, pieces, particles orbitting. irregular line

abstract arc arch beams bits centre circle circular circulation concentric confluence converge convergence converging dashed discontinue dissension epicentre expansion flick flicker fluctuating frequency gap helix infrequent intermittent interrupt interval inward irregular linear lines loop merging odd orbit particle periodic piece radar radial radiate rays repetition segment stripes twist vector whirligig