x[sub]n+1[/sub]=10a[sub]1[/sub]+(x[sub]n[/sub]+a[sub]2[/sub]sin(a[sub]3[/sub]y[sub]n[/sub]+a[sub]4[/sub]))cos(w)+y[sub]n[/sub]sin(w)[br]y[sub]n+1[/sub]=10a[sub]5[/sub]-(x[sub]n[/sub]+a[sub]2[/sub]sin(a[sub]3[/sub]y[sub]n[/sub]+a[sub]4[/sub]))sin(w)+y[sub]n[/sub]sin(w)[br]w=[math]\frac{2\pi}{13+10a_6}[/math], (x[sub]0[/sub],y[sub]0[/sub])=A