maelstrom          {
  reset=1960 type=formula 
  formulaname=formula140 passes=1
  center-mag=0.987499/-0.200017/1.313535 float=y maxiter=256
  inside=bof61
  colors=000QRU<35>yyyzzzyyy<45>CCGAAFABG<44>luxmwzmvy<38>BCHAAFBCG<24>mzz\
  <32>EFKDDICCHAAFAAFAAFABF<15>PQT
  }
frm:formula140 {; Giuseppe Zito
 z = pixel ,
c1 = -0.524192
c7 = -0.430757
d0 = 0.222002
d4 = 0.893133
  : 
 x = real(z), y = imag(z)
s0 = y
s1 =c1
s0 = s0 *s1
s0 = s0 -x
s0 = s0 -c7
newx = s0 
s0 =d0
s0 = s0 -x
s0 = s0 -d4
s0 = s0 *y
s0 = s0 +x
newy = s0 
z = newx + flip(newy)
 newx < 4 && newx > -4 && newy < 4 && newy > -4 
}