circola            {
  reset=1960 type=formula 
  formulaname=circola passes=1
  center-mag=-2.429e-005/2.444e-005/0.1718229 inside=bof60
  viewwindows=4.2/0.75/yes/300/0
  colors=cye<62>0A40A41B5<55>cyeCNO<4>7GK5EJ6FK<29>dxxfzzfyy<29>DCRCAPDBQ<\
  29>ieskgtjft<29>47S
  }
frm:circola {; Giuseppe Zito
 z = pixel ,
c3 = 0.639032
c5 = -0.756293
c11 = -0.239036
c12 = 0.646753
d8 = -0.646844
  : 
 x = real(z), y = imag(z)
s0 = y
s0 = s0 *c3
s0 = s0 +x
s0 = s0 *c5
s0 = s0 +x
s0 = s0 -x
s0 = s0 /y
s0 = s0 +c11
s0 = s0 +c12
newx = s0 
s0 = x
s0 = s0 /y
s0 = s0 *x
s0 = s0 +y
s0 = s0 *d8
newy = s0 
z = newx + flip(newy)
 newx < 4 && newx > -4 && newy < 4 && newy > -4 
}