Phase diagrams of chaotic system in different initial conditions with the changing of z₀: (a) z₀ = –5, (b) z₀ = –2.5, (c) z₀ = –2, (d) z₀ = –1, (e) z₀ = –0.5, (f) z₀ = 0, (g) z₀ = 1, and (h) z₀ = 2.