nautilus           { ; Fractal of the day, 03-08-97
                     ; 6 minutes at 100mhz, 640x480
  reset=1960 type=formula formulaname=JulibrotInvZ
  passes=1 center-mag=-0.51357/0.345525/21.50115
  params=2.47/0/0.405/0/0.01/0 float=y maxiter=1200 bailout=100
  inside=0 symmetry=xaxis periodicity=10
  colors=000DNK<20>39N39N4CP<17>5mr5os7im<6>L9D<29>mmEmnEmnE<4>klEqLG<37>n\
  cQP37<19>Jn7Jp7Kq9<10>RtVVwU<6>4gi<46>ku2ku2kt3<29>kbNBLJ<3>EPJEPJDOK
  }

frm:JulibrotInvZ {; Jim Muth
z=pixel, c=p2+(pixel*p3):
z=(-z)^p1+c,
|z| <= 100
}