diff --git a/Lib/Makefile b/Lib/Makefile
index c9360b9..bf12ad6 100644
--- a/Lib/Makefile
+++ b/Lib/Makefile
@@ -64,6 +64,7 @@ extractbits.o:	extractbits.c	$(DEPS)
 filtadapt.o:	filtadapt.c	$(DEPS)
 filtres.o:	filtres.c	$(DEPS)
 falsecolors.o:	falsecolors.c	$(DEPS)
+functions.o:	functions.c	$(DEPS)		# new Aug 15, 2024
 
 gadgrect.o:	gadgrect.c	$(DEPS)
 glitch.o:	glitch.c	$(DEPS)
@@ -153,6 +154,7 @@ OBJECTS =	7seg.o							\
 		doublesz.o drawalpha.o drawing.o drawpatt.o		\
 		effects.o effects2.o effects3.o extractbits.o		\
 		filtadapt.o filtres.o falsecolors.o			\
+		functions.o						\
 		gadgrect.o glitch.o gradient.o				\
 		halfsize.o						\
 		image.o	imprime.o					\
diff --git a/Lib/foo.c b/Lib/foo.c
index 1cbfcc1..8759686 100644
--- a/Lib/foo.c
+++ b/Lib/foo.c
@@ -8,41 +8,52 @@
 
 /*		==============================				*/
 
-int essai_false_colors(void)
+/* new Wed Aug 14 19:17:20 UTC 2024
+ *
+ *	parameters :
+ *		ip: Image_Desc * of input picture
+ *		ix, iy:	coordinate of the pixel in this pic.
+ *		op, ox, oy : same things for output picture
+ */
+#define PIXEL_COPY(ip, ix, iy, op, ox, oy)	\
+			do {			\
+						\
+			} while (0)
+
+#define SZPIC   7777	
+
+double tthi_dtime(void);
+
+void essai_pixcopy(void)
 {
-int			foo;
-RGB_map			luts;
+Image_Desc	*alice, *bob;
+int		x, y;
+double		T0, T1;
+long		count;
 
-foo = Image_gen_fc_lut(27e3, 33, &luts);
-fprintf(stderr, "retour gen_fc_lut = %d\n", foo);
+alice = Image_alloc(SZPIC, SZPIC, IMAGE_RGB);
+bob   = Image_alloc(SZPIC, SZPIC, IMAGE_RGB);
 
-return -1;
+T0 = tthi_dtime();
+count = 0L;
+for (y=0; y<SZPIC; y++) {
+	for (x=0; x<SZPIC; x++) {
+
+		Image_pixel_copy(alice, x, y, bob, x, y);
+		count++;
+
+		}
+	}
+
+T1 = tthi_dtime();
+
+fprintf(stderr, "count %ld, elapsed %g\n", count, T1-T0);
+
+/* end */
 }
 
 /*		==============================				*/
 
-int essai_show_t16x24( char *text)
-{
-if (NULL != text)
-	Image_t16x24_essai("16x24thin", text, "16x24.tga");
-else
-	Image_t16x24_essai("16x24gruik", "0123456789abcdef", "16x24.tga");
-return 0;
-}
-
-/*		==============================				*/
-
-void essai_gradients(void)
-{
-int		foo;
-
-foo = Image_plot_H_gradient("foo.tga", 640, 200);
-fprintf(stderr, "plot h gradient -> %d\n", foo);
-foo = Image_plot_V_gradient("foo.tga", 900, 200);
-fprintf(stderr, "plot v gradient -> %d\n", foo);
-}
-/*		==============================				*/
-
 int main(int argc, char *argv[])
 {
 
@@ -50,11 +61,11 @@ fprintf(stderr, "*** %s is running\n", argv[0]);
 
 if (argc > 1) {
 	fprintf(stderr, "argument: %s\n", argv[1]);
-	Image_print_version(0);
+	Image_print_version(2);
 	Image_print_sizeof_structs("foo");
 	}
 else	{
-	essai_false_colors();
+	essai_pixcopy();
 	}
 
 /*
diff --git a/Lib/functions.c b/Lib/functions.c
new file mode 100644
index 0000000..e3d0fd6
--- /dev/null
+++ b/Lib/functions.c
@@ -0,0 +1,27 @@
+/*
+ *		miscellaneous functions
+ *		-----------------------
+ *
+ * new:  Thu Aug 15 09:55:36 UTC 2024
+ *
+ */
+
+#include  <stdio.h>
+#include  <sys/time.h>
+
+#include  "../tthimage.h"
+
+/* ------------------------------------------------------------------- */
+/*
+ *	for what FSCKING reason, this func is not in the stdlib ???
+ */
+double tthi_dtime(void)
+{
+struct timeval  t;
+double          d;
+(void)gettimeofday(&t, NULL);
+d = (double)t.tv_sec + (double)t.tv_usec / 1e6;
+return d;
+}
+/* ------------------------------------------------------------------- */
+/* ------------------------------------------------------------------- */