matress {
fractal:
  title="matress" width=1024 height=768 numlayers=1
layer:
  caption="Layer 1" visible=yes alpha=no
mapping:
  center=0.00360932980172900096/0.0314823370088138996
  magn=0.963817980180404798 angle=359.9178115211656
formula:
  filename="zg.frm" entry="matress" maxiter=9 percheck=normal
inside:
  filename="Fractint.ucl" entry="inside" transfer=linear repeat=yes
  p_inside="nnn" p_n=1 p_logmap=0 p_smooth=yes p_tolerance=1
outside:
  filename="dmj.ucl" entry="dmj-Lyapunov" transfer=linear repeat=yes
  p_trackvariable="magnitude of z" p_negative="absolute value"
gradient:
  smooth=yes numnodes=10 index=0 color=127940 index=40 color=14751378
  index=80 color=2856598 index=120 color=2791754 index=160 color=7680027
  index=200 color=3003128 index=240 color=15346411 index=280 color=5490089
  index=320 color=15238454 index=360 color=11501133
}

zg.frm:matress {; Giuseppe Zito
 z = pixel ,

c2 = 0.68162298

c8 = 0.96401101

d1 = -0.95945197

d5 = -0.458745

d12 = -0.425805

d15 = -0.36000001

  : 
 x = real(z), y = imag(z)

s0 = y

s0 = s0 /c2

s0 = s0 *y

s0 = s0 *y

s0 = s0 -y

s0 = s0 *c8

newx = s0 

s0 = y

s0 = s0 /d1

s0 = s0 +y

s0 = s0 *y

s0 = s0 -d5

s0 = s0 -y

s0 = s0 +y

s1 =d12

s1 = s1 *x

s1 = s1 /x

s1 = s1 -d15

s0 = s0 *s1

s0 = s0 /x

s0 = s0 -y

s0 = s0 +x

s0 = s0 +y

newy = s0 

z = newx + flip(newy)
 newx < 4 && newx > -4 && newy < 4 && newy > -4 
}