[list=1][*]Drag the black point around. This point establishes the initial conditions. [/*][*]Change the parameters to observe the behaviour of the critical points [b]X[sub]1[/sub][/b], [b]X[sub]2[/sub][/b] and [b]X[sub]3[/sub][/b].[/*][*]If needed, use the tools zoom in or out.[/*][/list]