diff --git a/Notebooks/04_Les_fonctions_avec_parametres.ipynb b/Notebooks/04_Les_fonctions_avec_parametres.ipynb
index 3c8fa90535973cddb76947c87b03847abfff3e86..acb7ce0a18f4d11f2976dd9c61be8b9dec67a30c 100644
--- a/Notebooks/04_Les_fonctions_avec_parametres.ipynb
+++ b/Notebooks/04_Les_fonctions_avec_parametres.ipynb
@@ -39,7 +39,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\ndef rectangle(d, e):    # paramètres (d, e)\n    for i in range(2):\n        forward(d)\n        left(90)\n        forward(e)\n        left(90)\n\nrectangle(160, 100)      # largeur=160, hauteur=100\n\n# à compléter\n\ndone()"
@@ -58,7 +58,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\ndef losange(d, a):      # paramètres (d=distance, a=angle)\n    for i in range(2):\n        forward(d)\n        left(a)\n\n        forward(d)\n        left(180-a)\n\nlosange(100, 60)            # distance=100, angle=60\nlosange(140, 100)           # distance=140, angle=100\n\ndone()\n"
@@ -82,7 +82,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\ndef maison(d):\n    dot()\n    forward (1.41*d)  # sol\n    left(90)\n    forward(d)  # mur droit\n    left(45)\n    forward(d)  # toit droit\n    left(90)\n    forward(d)  # toit gauche\n    left(45)\n    forward(d)  # mur gauche\n    left(90)\n\nbackward(200)\nmaison(50)      # maison de taille 50\nforward(100)\nmaison(70)      # maison de taille 70\n\n# à compléter\n\ndone()\n"
@@ -101,7 +101,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\nup()\n\ndef maison(d, c):\n    dot()\n    down()\n    fillcolor(c)\n    begin_fill()\n    forward (1.41*d)  # sol\n    left(90)\n    forward(d)  # mur droit\n    left(45)\n    forward(d)  # toit droit\n    left(90)\n    forward(d)  # toit gauche\n    left(45)\n    forward(d)  # mur gauche\n    left(90)\n    end_fill()\n    up()\n\ngoto(0,0)\nmaison(70, 'lightblue')\ngoto(150, 30)\nmaison(50, 'yellow')\n\ndone()\n"
@@ -120,7 +120,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\ndef rectangle(d, e, c):\n    fillcolor(c)\n    begin_fill()\n    for i in range(2):\n        forward(d)\n        left(90)\n        forward(e)\n        left(90)\n    end_fill()\n\ndef drapeau(d, c1, c2, c3):\n    rectangle(d, 2*d, c1)\n    forward(d)\n    rectangle(d, 2*d, c2)\n    forward(d)\n    rectangle(d, 2*d, c3)\n\ndrapeau(50, 'blue', 'white', 'red')\n\ndone()\n"
@@ -139,7 +139,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\ndef arbre(d, c, c2):\n    down()\n    left(90)\n    width(d/6)      # tronc\n    pencolor(c)\n    forward(d)\n    dot(d, c2)      # feuillage\n    up()\n    backward(d)     # retourner à la position de départ\n    right(90)\n\n\narbre(100, 'brown', 'lime')\nforward(70)\narbre(90, 'brown', 'green')\n\ndone()\n"
@@ -158,7 +158,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\ndef coeur(r, c):\n    down()\n    fillcolor(c)\n    begin_fill()\n    left(90)\n    circle(r, 225)\n    forward(2.4*r)\n    left(90)\n    forward(2.4*r)\n    circle(r, 225)\n    left(90)\n    end_fill()\n    up()\n\ncoeur(50, 'darkviolet')\nforward(130)\ncoeur(40, 'tomato')\n\ndone()\n"
@@ -177,7 +177,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\ndef triangle_couleur(d, c):\n    pencolor(c)\n    for i in range(3):\n        forward(d)\n        left(120)\n\ntriangle_couleur(\"red\", 100)\n\ndone()"
@@ -191,7 +191,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\n# pour être à gauche du canevas\nbackward(250)\n\n# Code à factoriser\nfor k in range(3):\n    forward(30)\n    right(120)\nforward(30)\nfor k in range(3):\n    forward(60)\n    right(120)\nforward(60)\nfor k in range(3):\n    forward(90)\n    right(120)\nforward(90)\nfor k in range(3):\n    forward(120)\n    right(120)\nforward(120)\nfor k in range(3):\n    forward(150)\n    right(120)\n\ndone()\n"
@@ -199,13 +199,13 @@
   {
    "cell_type": "markdown",
    "metadata": {},
-   "source": "<h3 style=\"color:teal;background-color:azure;\" > <i class=\"fa fa-pencil\" aria-hidden=\"true\"> </i> &nbsp; Exercice 10 </h3>\n\n\nDéfinir une fonction `carre_couleur(d,c )` qui demande à la tortue de\ndessiner des carrés colorés de longueur variés. Elle doit dessiner trois triangles comme sur la figure ci-dessous.\n\n![Image carres colorés](https://githepia.hesge.ch/info_sismondi/exercices-1ere/-/raw/main/Notebooks/imgs_chap4/ex_carres_couleur.png)"
+   "source": "<h3 style=\"color:teal;background-color:azure;\" > <i class=\"fa fa-pencil\" aria-hidden=\"true\"> </i> &nbsp; Exercice 10 </h3>\n\n\nDéfinir une fonction `carre_couleur(d,c )` qui demande à la tortue de\ndessiner des carrés colorés de longueur variés. Elle doit dessiner trois carrés comme sur la figure ci-dessous.\n\n![Image carres colorés](https://githepia.hesge.ch/info_sismondi/exercices-1ere/-/raw/main/Notebooks/imgs_chap4/ex_carres_couleur.png)"
   },
   {
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\n# a compléter\n\ndone()"
@@ -219,7 +219,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\ndef rangee_triangles(nombre, cote):\n    # a compléter\n\n# a compléter\n\ndone()"
@@ -233,7 +233,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\n\ndef maison(h, c):\n    # a compléter\n    \n\nspeed(9) # pour dessiner vite\n# dessiner le village (a compléter)\n# a compléter\ndone()"
@@ -247,7 +247,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\npenup()\n\ndef rectangle(p, d, e, w=1, pen='black', fill='white'):\n    goto(p)\n    pendown()\n    width(w)\n    pencolor(pen)\n    fillcolor(fill)\n    begin_fill()\n    for i in range(2):\n        forward(d)\n        left(90)\n        forward(e)\n        left(90)\n    end_fill()\n    penup()\n\nrectangle([-200, 30], 40, 30)\nrectangle([-100, -20], 40, 30, 1, 'orange', 'orange')\nrectangle([100, -40], 30, 80, fill='yellow')\nrectangle([200, 100], 80, 40, 1, 'red', 'pink')\n\ndone()\n"
@@ -261,7 +261,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\ndef polygon(d, n, w=1, pen='black', fill='white'):\n    down()\n    pencolor(pen)\n    width(w)\n    fillcolor(fill)\n    begin_fill()\n    for i in range(n):\n        forward(d)\n        left(360/n)\n    end_fill()\n    up()\n\nup()\nbackward(280)\nfor n in range(3, 9):\n    polygon(40, n, fill='lime')\n    color('black')\n    forward(100)\n\ndone()\n"
@@ -275,7 +275,7 @@
    "cell_type": "code",
    "execution_count": null,
    "metadata": {
-    "trusted": true
+    "trusted": false
    },
    "outputs": [],
    "source": "from turtle import *\n\ndef polygon(d, n, m=1, w=1, pen='black', fill='white'):\n    down()\n    pencolor(pen)\n    width(w)\n    fillcolor(fill)\n    begin_fill()\n    for i in range(n):\n        forward(d)\n        left(m*360/n)\n    end_fill()\n    up()\n\nup()\nspeed(0)\nbackward(250)\nfor m in range(2, 6):\n    polygon(80, 11, m, fill='yellow')\n    color('black')\n    forward(140)\n\ndone()\n"