. between 1 & 4 performers should concentrate on expressing musically the surfaces.
. block one: smooth to the touch, constant with gentle changes in timbre where light falls . block two: shaped, angular but with the same sense of continuation as block one . block three: pinpoints of light, skyward expression . block four: previous elements should be used, with an increasing sense of expansion and final calm
. duration / tempo: is open, the performers to decide together.