FourPerfectSpirals { ; Fractal of the day, 19-05-00 Rating (6)
                     ; time=0:29:18.22, SF5 on a P200
                     ;  Version 2000 Patchlevel 9
  reset=2000 type=formula 
  formulaname=MandelbrotMix4 function=recip passes=1
  center-mag=+0.09743271960894634/-1.19914809623739200\
  /1.109749e+009/1/-139.999 params=1/-2/1/-15/1/0
  float=y maxiter=7200 bailout=25 inside=0 logmap=466
  symmetry=none periodicity=10
  colors=000IH4IH4KJ8NMD<2>VUOYXS_ZX<3>jikmkoonsiqvbrw\
  XsyQszJuz<2>0wz7sw<2>RkcYiYefQ<2>yZ6zX03zg7z_AuUDnMF\
  gFIa7KX0MV0NU0OU0QS0<2>UQ0VQ0XO0YN0YN0ZM0_K0<3>eI0fH\
  0gH0iF0iF0jM6jRBjXHjaKjfQjkVjg_jfcckiZbmUSrOJvJOzE0z\
  B6z8Bz6Iz4Nz2Sz0Zz0cz0jz0oz0uz0sz0sz0sz<2>0sr0so0qk0\
  ni0mf0jb2i_4fY7eV8bRBaOEZMFYJHVMHSOHRRIOUIMXIKYJI_JH\
  bJEeKBgKAiK7kM4nM3qM0sMKuQ7nUOgXXa_VVbbOfjIikBz_DrZD\
  vQDzREz6Ez0Ez7NzHV<2>oirsbjwYbzRXzMOzHI<4>zVIzYIz_Iz\
  cIziIznI<3>z_HzXHzVHzSFzRF<2>zKFzIFzHEzEEsBEmAEf7E_6\
  EUDENBFJAFQ8H<3>e3Ii2Jm0J<2>y0Kz0Mz0Mz0Mz0Kz0Jz0Jy2I\
  w4Iu7HrAHoBFmEFkHEiJEfKDcNDaQBYR8_SBaUDbVEcXHeYIfZJi\
  _KjaN<2>neSofUrfV<2>vf_wfazfeyfb<3>jfSffQbfN_fKXfISf\
  FOfDHf2MfAQfIVfQZfXbfcgfkkfsqfzofz<3>mfkmfgkfe<3>ifR\
  0fX0fX0fV0fU0fU
  }

frm:MandelbrotMix4 {; Jim Muth
a=real(p1), b=imag(p1), d=real(p2), f=imag(p2),
g=1/f, h=1/d, j=1/(f-b), z=(-a*b*g*h)^j,
k=real(p3)+1, l=imag(p3)+100, c=fn1(pixel):
z=k*((a*(z^b))+(d*(z^f)))+c,
|z| < l
}