Here we take ds2 =¯ gαβ(xα,l)dxα dxβ, using all of the 5 available coordinate degrees of freedom to suppress the potentials of electromagnetic and scalar type, but leaving the metric otherwise general. The solution of (9) is l = l0 exp[±i(s − s0)/L], where l0 and s0 are constants of which the latter may be absorbed. Then l = l0 e±is/L describes an l-orbit that oscillates about spacetime with amplitude l0 and wavelength L. The motion is actually simple harmonic, since d2l/ds2 =−l/L2. Also,dl/ds =