  We calculate the volume and action forms of holographic complexity for the
gravitational collapse of scalar field matter in asymptotically anti-de Sitter
spacetime, using numerical methods to reproduce the geometry responding to the
oscillating field over multiple crossing times. Like the scalar field pulse,
the volume complexity oscillates quasiperiodically before horizon formation. It
also shows a scaling symmetry with the amplitude of the scalar field. The
action complexity is also quasiperiodic with spikes of increasing amplitude.
