Scaling of the absolute value of the driving velocity with peak current |J|_max, peak reconnection rate and sheet dimensions in the x and y directions (L_x,L_y) taken as the full width at half maximum. Here runs for one pulse are in green and with two are in black (t_lag = 0), red t_lag = 0.9 and blue t_lag = 1.8 when τ = 1.8, A_d = 80 and η = 5 × 10^-4. (This figure is available in color in the electronic form.)