Geometry of our model. The accretion disc varies on long timescales and extends from 400r_g–r_trc. The inner regions from r_trc–r_sh and r_sh–1.23r_g are turbulent inner flows varying intrinsically on fast timescales that are responsible for the soft and hard spectral emission, respectively. The accretion disc provides seed photons to the inner hot flows, and reprocesses and reflects the Comptonized emission photons coming back from the inner regions. The parameter t_p is the time taken for fluctuations to propagate from r_trc to r_sh.