diff --git a/GrafAnim/Makefile b/GrafAnim/Makefile
index bb577a0..e333017 100644
--- a/GrafAnim/Makefile
+++ b/GrafAnim/Makefile
@@ -21,7 +21,8 @@ trigofest:	trigofest.f90 Makefile vue3axes.o utils_ga.o
 			utils_ga.o -o $@
 
 noisepic:	noisepic.f90  Makefile
-	gfortran $(GFOPT) $< ../Modules/spitpgm.o ../Modules/pixrgb.o \
+	gfortran $(GFOPT) $< ../Modules/spitpgm.o ../Modules/pixrgb.o	\
+				../Modules/noisepictures.o		\
 		-o $@
 
 # ---- modules locaux
diff --git a/GrafAnim/noisepic.f90 b/GrafAnim/noisepic.f90
index 7f36696..dc791ab 100644
--- a/GrafAnim/noisepic.f90
+++ b/GrafAnim/noisepic.f90
@@ -2,6 +2,7 @@ program noisepic
 
   use spitpgm
   use pixrgb
+  use noisepictures
   implicit none
 
   integer                   :: numframe = 0
@@ -17,11 +18,11 @@ program noisepic
        read (arg, *) numframe
   endif
 
-  ranges(0) = 10    ;    ranges(2) = 90
+  ranges(1) = 10    ;    ranges(2) = 90
   ranges(3) = 110   ;    ranges(4) = 166
   ranges(5) = 205   ;    ranges(6) = 230
   nbre = 1000+(numframe*555)
-  call make_noise_color_range_pic(numframe, ranges, nbre)
+  call make_noise_bw_pic (numframe)
 
 contains
 !-- ------------------------------------------------------------------
@@ -44,33 +45,13 @@ subroutine make_noise_bw_pic (value)
   foo = irand()
   print *, 'val=', value, '       rnd=', foo
 
-  call plot_noise_bw_pic(pic, 15000)
+  ! call plot_noise_bw_pic(pic, 15000)
+  call noise_gray8_pic(pic, 15000)
 
   write (filename, "(a, i5.5, a)") "", value, ".pgm"
   call spit_as_pgm_8(pic, trim(filename))
 end subroutine
 !-- ------------------------------------------------------------------
-subroutine plot_noise_bw_pic(picz, nbre)
-  implicit none
-
-  integer, dimension(:,:), intent(inout) :: picz
-  integer, intent(in)                    :: nbre
-
-  integer                                :: width, height
-  integer                                :: quux, ix, iy, iv
-
-  width = ubound(picz, 1)  ;  height = ubound(picz, 2)
-  ! print *, 'sz picz', width, height
-
-  do quux=1, nbre
-    ix = 1 + mod ( irand(), width )
-    iy = 1 + mod ( irand(), height )
-    iv = mod ( irand(), 256 )
-    ! print *, ix, iy
-    picz(ix, iy) = iv
-  enddo
-end subroutine
-
 !-- ------------------------------------------------------------------
 !-
 !-	Colorized
diff --git a/Modules/noisepictures.f90 b/Modules/noisepictures.f90
new file mode 100644
index 0000000..4e1e10e
--- /dev/null
+++ b/Modules/noisepictures.f90
@@ -0,0 +1,80 @@
+module noisepictures
+    use  pixrgb
+    implicit none
+
+    contains               ! a lot of garbage ?
+
+!-----------------------------------------------------------------------
+subroutine noise_gray8_pic(pict, nbre)
+  implicit none
+  integer, dimension(:,:), intent(inout) :: pict
+  integer, intent(in)                    :: nbre
+  integer :: quux, ix, iy, width, height
+
+  width = ubound(pict, 1)  ;  height = ubound(pict, 2)
+
+  do quux=1, nbre
+    ix = 1 + mod ( irand(), width )
+    iy = 1 + mod ( irand(), height )
+    pict(ix, iy) = mod ( irand(), 256 )
+  enddo
+
+end subroutine
+!-----------------------------------------------------------------------
+subroutine noise_gray16_pic(pict, nbre)
+  implicit none
+  integer, dimension(:,:), intent(inout) :: pict
+  integer, intent(in)                    :: nbre
+  integer :: quux, ix, iy, width, height
+
+  width = ubound(pict, 1)  ;  height = ubound(pict, 2)
+
+  do quux=1, nbre
+    ix = 1 + mod ( irand(), width )
+    iy = 1 + mod ( irand(), height )
+    pict(ix, iy) = mod ( irand(), 65536 )
+  enddo
+
+end subroutine
+!-----------------------------------------------------------------------
+subroutine noise_rgb8_pic(prgb, nbre)
+  implicit none
+  type(t_pixrgb), dimension(:,:), intent(inout) :: prgb
+  integer, intent(in)                           :: nbre
+  integer :: quux, ix, iy, width, height
+
+  print *, 'noise_rgb_pic', nbre
+
+  width = ubound(prgb, 1)  ;  height = ubound(prgb, 2)
+
+  do quux=1, nbre
+    ix = 1 + mod ( irand(), width )
+    iy = 1 + mod ( irand(), height )
+    prgb(ix, iy)%r = mod ( irand(), 256 )
+    prgb(ix, iy)%g = mod ( irand(), 256 )
+    prgb(ix, iy)%b = mod ( irand(), 256 )
+  enddo
+
+end subroutine
+!-----------------------------------------------------------------------
+subroutine noise_rgb16_pic(prgb, nbre)
+  implicit none
+  type(t_pixrgb), dimension(:,:), intent(inout) :: prgb
+  integer, intent(in)                           :: nbre
+  integer :: quux, ix, iy, width, height
+
+  print *, 'noise_rgb_pic', nbre
+
+  width = ubound(prgb, 1)  ;  height = ubound(prgb, 2)
+
+  do quux=1, nbre
+    ix = 1 + mod ( irand(), width )
+    iy = 1 + mod ( irand(), height )
+    prgb(ix, iy)%r = mod ( irand(), 65536 )
+    prgb(ix, iy)%g = mod ( irand(), 65536 )
+    prgb(ix, iy)%b = mod ( irand(), 65536 )
+  enddo
+
+end subroutine
+!-----------------------------------------------------------------------
+end module noisepictures
\ No newline at end of file
diff --git a/Modules/trnd.f90 b/Modules/trnd.f90
index a520c3e..32ad182 100644
--- a/Modules/trnd.f90
+++ b/Modules/trnd.f90
@@ -1,21 +1,66 @@
 program essai
 
   use mathstuff2
+  use pixrgb
+  use spitpgm
+  use noisepictures
   implicit none
 
   integer                     :: foo, bar
-  real                        :: quux
-  double precision            :: somme
 
   write(0, *)   "----------------- essai -------------------"
 
   call init_random_seed()           ! in module 'mathstuff'
-  somme = 0.0
-  do foo=1, 500
-    quux = rand() + rand()
-    somme = somme + quux
-    bar = mod(irand(), 7)
-    print *, foo, quux, somme/foo, bar
-  enddo
+  call test_noisepictures_rgb()
+  call test_noisepictures_gray()
+
+contains
+!-----------------------------------------------------------------------
+
+subroutine test_noisepictures_rgb ()
+  implicit none
+
+  type(t_pixrgb), allocatable       :: pix (:,:)
+  integer                           :: nombre
+  print *, '------ test des noisepictures RGB'
+
+  allocate(pix(800, 600))
+  nombre = (800*600)/4
+
+  call rgbpix_set_to_rgb(pix, 0, 0, 0)
+  call noise_rgb8_pic(pix, nombre)
+  call rgbpix_spit_as_pnm_8(pix, 'foo8.pnm')
+
+  call rgbpix_set_to_rgb(pix, 0, 0, 0)
+  call noise_rgb16_pic(pix, nombre)
+  call rgbpix_spit_as_pnm_16(pix, 'foo16.pnm')
+
+  deallocate (pix)
+
+end subroutine
+!-----------------------------------------------------------------------
+subroutine test_noisepictures_gray ()
+  implicit none
+
+  integer, allocatable       :: pix (:,:)
+  integer                           :: nombre
+  print *, '------ test des noisepictures GRAY'
+
+  allocate(pix(800, 600))
+  nombre = (800*600)/4
+
+  pix = 0
+  call noise_gray8_pic(pix, nombre)
+  call spit_as_pgm_8(pix, 'bar8.pgm')
+
+  pix = 0
+  call noise_gray16_pic(pix, nombre)
+  call spit_as_pgm_16(pix, 'bar16.pgm')
+
+  deallocate (pix)
+
+end subroutine
+
+!-----------------------------------------------------------------------
 
 end program