diff --git a/experiment/assemblage.c b/experiment/assemblage.c
index 368df04..6cca803 100644
--- a/experiment/assemblage.c
+++ b/experiment/assemblage.c
@@ -22,7 +22,7 @@ if (foo) {
 	fprintf(stderr, "%s: Kkrkr %d pour create grande\n", __func__, foo);
 	return -1;
 	}
-fimg_vdeg_a(&grande, 13.37);
+fimg_vdeg_a(&grande, 2345);
 
 foo = fimg_create(&incrust, 640, 480, FIMG_TYPE_RGB);
 if (foo) {
@@ -31,8 +31,12 @@ if (foo) {
 	}
 // fimg_drand48(&incrust, 13.37);
 foo = fimg_load_from_dump("foo.fimg", &incrust);
+if (foo) {
+	fprintf(stderr, "%s: err %d loading image\n", __func__, foo);
+	return -1;
+	}
 
-foo = incrustator_0(&incrust, &grande, 100, 100, 0);
+foo = incrustator_0(&incrust, &grande, 333, 333, 0);
 if (foo) {
 	fprintf(stderr, "%s: Kkrkr %d sur incrustator_0\n", __func__, foo);
 	return -1;
@@ -45,6 +49,8 @@ if (foo) {
 	return -1;
 	}
 
+fimg_destroy(&incrust);		fimg_destroy(&grande);
+
 return 0;
 }
 /* ---------------------------------------------- ~~~~~~~~~~~~~~~~ */
@@ -52,7 +58,7 @@ int main(int argc, char *argv[])
 {
 int		foo;
 
-verbosity = 1;
+verbosity = 2;
 
 fimg_print_version(1);
 
diff --git a/experiment/essai.sh b/experiment/essai.sh
new file mode 100755
index 0000000..6e49711
--- /dev/null
+++ b/experiment/essai.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+
+make assemblage
+
+grabvidseq -vv -n 4 -p 3.3333 -o foo.fimg
+
+./assemblage -v
+
+display out.pnm
diff --git a/experiment/incrustator.c b/experiment/incrustator.c
index 6f6f076..eed2e45 100644
--- a/experiment/incrustator.c
+++ b/experiment/incrustator.c
@@ -36,15 +36,17 @@ if (	(xpos < 0)  || (xpos > pdst->width  - psrc->width)  ||
 
 /* move all the data by looping over lines */
 srcpos = 0;
+dstpos = (ypos * pdst->width) + xpos;
 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->width;
+	dstpos += pdst->width;
 	}
 
 return 0;