mantle             {
  reset=1960 type=formula 
  formulaname=formula31 center-mag=0.0420233/0.839084/1.253078
  params=-0.58/0 float=y maxiter=100 inside=bof60
  colors=000`8i<17>yw2zz0yw1<5>sg7qe9nd9<13>0LL<23>0Xh0Yi0Zi0_j0`k<6>2gq<1\
  0>dtz<5>PmnMklJjjGhhDgf<2>8c_<25>zwbwtb<8>SHS<4>eHXhGYjEY<4>v7W<24>yubyw\
  bxu`<8>peNocLncL<10>bVJ<6>9RC<4>4P73O62N51M40L3<12>xu2<11>000AAC<2>J3SM0\
  YN0_<5>W0mY0pZ2n_5l
  }
frm:formula31 {; Giuseppe Zito
 z = pixel ,
 c0 = real(p1)
if(real(p1)==0)
 c0 = -0.614927
 endif
  : 
 x = real(z), y = imag(z)
newx = c0 + y
newy = x*x - y 
z = newx + flip(newy)
 newx < 4 && newx > -4 && newy < 4 && newy > -4 
}