All these pictures were generated by this program,
( 200 lines NTSC version )

Unfortunately I do not remember the parameter values that generated these
pictures.

lCOSz : the constant should be in the intervall ( 2.92 , PI ).
eSINz :                 - " -                   ( 0.1  , 0.4).

Also try the Magnetic formulas,
they make great pictures.
If you do magnetic pictures, use the plane Re : ( -6 , 6 ), Im : ( -6 , 6 ).

Also try the STR.ATT on menu 2 , STRANGE ATTRACTORS,
If you thought that Lorentz attractor were strange, look at this one.