Spiralling_Holes   { ; Fractal of the day, 11-02-99
                     ; 3hrs on a 486-100, 640x480
  reset=1960 type=formula 
  formulaname=MandelbrotMix4a function=recip passes=1
  center-mag=+0.71923491433375250/+0.01502976758606\
  822/6.791455e+009/1/34.999
  params=0.0033/-33/0.33/3/-2/0 float=y maxiter=5000
  bailout=25 inside=0 logmap=636 symmetry=none
  periodicity=10 colors=000J6D<5>H6ID2D<6>dOg<22>uz\
  e<8>CcH<22>eP5<22>ly3lzBmxL<5>sghtdlsal<7>m5d<4>i\
  1_i1Zh2X<19>SK6SK5TL6<22>ea7<17>KrA<4>FUA<2>MEi\
  <15>L5a<13>gAi<15>6_v<19>iAq
  }

frm:MandelbrotMix4a {; Jim Muth
; "a" suffix added by L.StClair 3/6/99
; to differentiate this version from the one previously posted
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
}