diff --git a/.gitignore b/.gitignore
index 282e61ae..fc83d170 100644
--- a/.gitignore
+++ b/.gitignore
@@ -76,3 +76,8 @@ Fonderie/singlepass
 Fonderie/crapdef.h
 Fonderie/crapstr.h
 
+experiment/assemblage
+experiment/*.fimg
+experiment/*.pnm
+experiment/*.o
+
diff --git a/experiment/Makefile b/experiment/Makefile
index f902b8e7..68b0e82d 100644
--- a/experiment/Makefile
+++ b/experiment/Makefile
@@ -1 +1,16 @@
-# plasma experiment
+
+#  experiments
+
+
+COPT = -Wall -fpic -g -DDEBUG_LEVEL=0 -lm
+DEPS = ../floatimg.h  ../libfloatimg.a Makefile
+LIBS = -ltiff -lpnglite -lcfitsio
+
+all:	assemblage
+
+incrustator.o:	incrustator.c incrustator.h Makefile
+	gcc -c $(COPT) $<
+
+assemblage:	assemblage.c Makefile incrustator.o
+	gcc $(COPT) $< incrustator.o ../libfloatimg.a $(LIBS) -o $@
+
diff --git a/experiment/README.md b/experiment/README.md
index dde30033..605e83e9 100644
--- a/experiment/README.md
+++ b/experiment/README.md
@@ -1 +1,3 @@
-# PLASMA EXPERIMENT 
\ No newline at end of file
+
+# ASSEMBLAGE
+
diff --git a/experiment/assemblage.c b/experiment/assemblage.c
new file mode 100644
index 00000000..8133361d
--- /dev/null
+++ b/experiment/assemblage.c
@@ -0,0 +1,69 @@
+/*
+ *		assemblage experimental
+ */
+
+#include  <stdio.h>
+#include  <stdlib.h>
+
+#include  "../floatimg.h"
+
+#include  "incrustator.h"
+
+int		verbosity;
+
+/* ---------------------------------------------- ~~~~~~~~~~~~~~~~ */
+int premier_essai(int largeur, int hauteur, char *outname)
+{
+FloatImg	grande, incrust;
+int		foo;
+
+foo = fimg_create(&grande, largeur, hauteur, FIMG_TYPE_RGB);
+if (foo) {
+	fprintf(stderr, "%s: Kkrkr %d pour create grande\n", __func__, foo);
+	return -1;
+	}
+fimg_vdeg_a(&grande, 13.37);
+
+foo = fimg_create(&incrust, 640, 480, FIMG_TYPE_RGB);
+if (foo) {
+	fprintf(stderr, "%s: Kkrkr %d pour create incrust\n", __func__, foo);
+	return -1;
+	}
+fimg_drand48(&incrust, 13.37);
+
+foo = incrustator_0(&incrust, &grande, 100, 100, 0);
+if (foo) {
+	fprintf(stderr, "%s: Kkrkr %d sur incrustator_0\n", __func__, foo);
+	return -1;
+	}
+
+foo =  fimg_export_picture(&grande, outname, 0);
+if (foo) {
+	fprintf(stderr, "%s: error %d export '%s'\n", __func__,
+					foo, outname);
+	return -1;
+	}
+
+return 0;
+}
+/* ---------------------------------------------- ~~~~~~~~~~~~~~~~ */
+int main(int argc, char *argv[])
+{
+int		foo;
+
+verbosity = 1;
+
+fimg_print_version(1);
+
+foo = premier_essai(1280, 1024, "out.pnm");
+if (foo) {
+	fprintf(stderr, "EPIC FAIL %s\n", argv[0]);
+	exit(1);
+	}
+
+return 0;
+}
+/* ---------------------------------------------- ~~~~~~~~~~~~~~~~ */
+
+
+
diff --git a/experiment/incrustator.c b/experiment/incrustator.c
new file mode 100644
index 00000000..94c37c74
--- /dev/null
+++ b/experiment/incrustator.c
@@ -0,0 +1,52 @@
+/*
+ *		incrustator experimental
+ */
+
+#include  <stdio.h>
+#include  <string.h>
+
+#include  "../floatimg.h"
+
+#include  "incrustator.h"
+
+extern int 		verbosity;
+
+/* ---------------------------------------------------------------- */
+int incrustator_0(FloatImg *psrc, FloatImg *pdst,
+				int xpos, int ypos, int flags)
+{
+int	y, srcpos, dstpos, szl;
+
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( %p %p %d %d 0x%04X\n", __func__, psrc, pdst,
+							xpos, ypos, flags);
+#endif
+
+if (verbosity > 1) {
+	fimg_describe(psrc, "source");
+	fimg_describe(pdst, "destination");
+	}
+
+/* check boudaries */
+if (	(xpos < 0)  || (xpos > pdst->width  - psrc->width)  ||
+	(ypos < 0)  || (ypos > pdst->height - psrc->height) ) {
+	fprintf(stderr, "%s: boudary error\n", __func__);
+	return -2;
+	}
+
+/* move all the data by looping over lines */
+srcpos = 0;
+szl = psrc->width * sizeof(float);
+for (y=0; y<psrc->height; y++) {
+	dstpos = ((y +ypos) * pdst->width) + xpos;
+	// fprintf(stderr, " %7d   %7d   %7d\n", y, srcpos, dstpos);
+
+	memcpy(pdst->R + dstpos, psrc->R + srcpos, szl);
+	memcpy(pdst->G + dstpos, psrc->G + srcpos, szl);
+	memcpy(pdst->B + dstpos, psrc->B + srcpos, szl);
+	srcpos += psrc->height;
+	}
+
+return 0;
+}
+/* ---------------------------------------------------------------- */
diff --git a/experiment/incrustator.h b/experiment/incrustator.h
new file mode 100644
index 00000000..9cd2b888
--- /dev/null
+++ b/experiment/incrustator.h
@@ -0,0 +1,7 @@
+/*
+ *		incrustator experimental
+ */
+
+
+int incrustator_0(FloatImg *psrc, FloatImg *pdst,
+				int xpos, int ypos, int flags);