diff --git a/Notebooks/imgs_chap5/img_exo_2spirales (copie 1).py b/Notebooks/imgs_chap5/img_exo_2spirales (copie 1).py
new file mode 100644
index 0000000000000000000000000000000000000000..a7470e62ca46a6cf40000f107a17ac8f5d932058
--- /dev/null
+++ b/Notebooks/imgs_chap5/img_exo_2spirales (copie 1).py	
@@ -0,0 +1,52 @@
+from turtle import *
+
+speed(0)
+WIDTH, HEIGHT = 500, 500
+
+screen = Screen()
+screen.setup(WIDTH + 4, HEIGHT + 8)  # fudge factors due to window borders & title bar
+
+
+penup()
+for k in range(21):
+    goto(-500+k*50,-500)
+    pendown()
+    goto(-500+k*50,500)
+    penup()
+for k in range(20):
+    goto(-500,-500+k*50)
+    pendown()
+    goto(500,-500+k*50)
+    penup()
+
+goto(0, -100)
+pendown()
+width(5)
+
+
+color("blue")
+right(90)
+
+x = 50
+for _ in range(3):
+    forward(x)
+    right(90)
+    x = x + 100
+
+color("red")
+x = x - 100
+for _ in range(5):
+    forward(x)
+    right(90)
+    x = x - 50
+
+shape('turtle')
+color("black")
+left(90)
+penup()
+goto(0, -100)
+
+ts = getscreen()
+ts.getcanvas().postscript(file="img_exo_2spirales.eps")
+
+done()
\ No newline at end of file
diff --git a/Notebooks/imgs_chap5/img_exo_2spirales.eps b/Notebooks/imgs_chap5/img_exo_2spirales.eps
new file mode 100644
index 0000000000000000000000000000000000000000..dfa5670fdf4c64955da3544ef33861af0164e329
--- /dev/null
+++ b/Notebooks/imgs_chap5/img_exo_2spirales.eps
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diff --git a/Notebooks/imgs_chap5/img_exo_2spirales.png b/Notebooks/imgs_chap5/img_exo_2spirales.png
index dfa5670fdf4c64955da3544ef33861af0164e329..cc7ff525152e5463d3486e0fe766d7a3df171254 100644
Binary files a/Notebooks/imgs_chap5/img_exo_2spirales.png and b/Notebooks/imgs_chap5/img_exo_2spirales.png differ
diff --git a/Notebooks/imgs_chap5/img_exo_carres (copie 1).py b/Notebooks/imgs_chap5/img_exo_carres (copie 1).py
new file mode 100644
index 0000000000000000000000000000000000000000..4c8828b91e44c63dba244248d04af066b7016294
--- /dev/null
+++ b/Notebooks/imgs_chap5/img_exo_carres (copie 1).py	
@@ -0,0 +1,44 @@
+from turtle import *
+
+speed(0)
+WIDTH, HEIGHT = 500, 500
+
+screen = Screen()
+screen.setup(WIDTH + 4, HEIGHT + 8)  # fudge factors due to window borders & title bar
+
+
+penup()
+for k in range(21):
+    goto(-500+k*50,-500)
+    pendown()
+    goto(-500+k*50,500)
+    penup()
+for k in range(20):
+    goto(-500,-500+k*50)
+    pendown()
+    goto(500,-500+k*50)
+    penup()
+
+# pour positionner le curseur en bas à gauche
+penup()
+goto(-200, -200)
+pendown()
+
+# mettre le bon style de trait
+width(5)
+color("red")
+
+def carre(longueur):
+    for _ in range(4):
+        forward(longueur)
+        left(90)
+# à compléter avec maximum 5 lignes
+x = 50
+for _ in range(8):
+    carre(x)
+    x = 50 + x
+
+ts = getscreen()
+ts.getcanvas().postscript(file="img_exo_carres.eps")
+
+done()
\ No newline at end of file
diff --git a/Notebooks/imgs_chap5/img_exo_carres.eps b/Notebooks/imgs_chap5/img_exo_carres.eps
new file mode 100644
index 0000000000000000000000000000000000000000..1e0fedbdfdc8edc27568fbb7a40e41c88a114824
--- /dev/null
+++ b/Notebooks/imgs_chap5/img_exo_carres.eps
@@ -0,0 +1,372 @@
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diff --git a/Notebooks/imgs_chap5/img_exo_carres.png b/Notebooks/imgs_chap5/img_exo_carres.png
index 1e0fedbdfdc8edc27568fbb7a40e41c88a114824..ac886413a2ff24a885922d57c43662ebbc927045 100644
Binary files a/Notebooks/imgs_chap5/img_exo_carres.png and b/Notebooks/imgs_chap5/img_exo_carres.png differ
diff --git a/Notebooks/imgs_chap5/img_exo_spirale (copie 1).py b/Notebooks/imgs_chap5/img_exo_spirale (copie 1).py
new file mode 100644
index 0000000000000000000000000000000000000000..74703db12f8e51c9a9afa6c2efa052856e324a82
--- /dev/null
+++ b/Notebooks/imgs_chap5/img_exo_spirale (copie 1).py	
@@ -0,0 +1,41 @@
+from turtle import *
+
+speed(0)
+WIDTH, HEIGHT = 500, 500
+
+screen = Screen()
+screen.setup(WIDTH + 4, HEIGHT + 8)  # fudge factors due to window borders & title bar
+
+
+penup()
+for k in range(21):
+    goto(-500+k*50,-500)
+    pendown()
+    goto(-500+k*50,500)
+    penup()
+for k in range(20):
+    goto(-500,-500+k*50)
+    pendown()
+    goto(500,-500+k*50)
+    penup()
+
+goto(-200, -200)
+pendown()
+width(5)
+
+color("red")
+
+x = 400
+for _ in range(8):
+    forward(x)
+    left(90)
+    x = x - 50
+
+shape('turtle')
+penup()
+goto(-200, -200)
+
+ts = getscreen()
+ts.getcanvas().postscript(file="img_exo_spirale.eps")
+
+done()
\ No newline at end of file
diff --git a/Notebooks/imgs_chap5/img_exo_spirale.eps b/Notebooks/imgs_chap5/img_exo_spirale.eps
new file mode 100644
index 0000000000000000000000000000000000000000..a7e2a622fd0ebcfed79f958abd77eae1cfae515e
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diff --git a/Notebooks/imgs_chap5/img_exo_spirale.png b/Notebooks/imgs_chap5/img_exo_spirale.png
index a7e2a622fd0ebcfed79f958abd77eae1cfae515e..53f0a70a7d96cf9997679b6b26c995fd0e2a2775 100644
Binary files a/Notebooks/imgs_chap5/img_exo_spirale.png and b/Notebooks/imgs_chap5/img_exo_spirale.png differ
diff --git a/Notebooks/imgs_chap5/img_exo_triangles (copie 1).py b/Notebooks/imgs_chap5/img_exo_triangles (copie 1).py
new file mode 100644
index 0000000000000000000000000000000000000000..423556f4997cd9a1159fafbbba05b431e2839055
--- /dev/null
+++ b/Notebooks/imgs_chap5/img_exo_triangles (copie 1).py	
@@ -0,0 +1,46 @@
+from turtle import *
+
+speed(0)
+WIDTH, HEIGHT = 500, 500
+L_carre = 25
+
+screen = Screen()
+screen.setup(WIDTH + 4, HEIGHT + 8)  # fudge factors due to window borders & title bar
+
+
+penup()
+for k in range(2*WIDTH//L_carre + 1):
+    goto(-WIDTH+k*L_carre,-HEIGHT)
+    pendown()
+    goto(-WIDTH+k*L_carre,HEIGHT)
+    penup()
+for k in range(2*HEIGHT//L_carre):
+    goto(-WIDTH,-HEIGHT+k*L_carre)
+    pendown()
+    goto(WIDTH,-HEIGHT+k*L_carre)
+    penup()
+
+# pour positionner le curseur en bas à gauche
+penup()
+goto(0, 0)
+pendown()
+
+# mettre le bon style de trait
+width(3)
+color("red")
+
+def triangle(longueur):
+    for _ in range(3):
+        forward(longueur)
+        left(120)
+# à compléter avec maximum 5 lignes
+x = 200
+for _ in range(6):
+    triangle(x)
+    left(60)
+    x = x - 25
+
+ts = getscreen()
+ts.getcanvas().postscript(file="img_exo_triangles.eps")
+
+done()
\ No newline at end of file
diff --git a/Notebooks/imgs_chap5/img_exo_triangles.eps b/Notebooks/imgs_chap5/img_exo_triangles.eps
new file mode 100644
index 0000000000000000000000000000000000000000..8b94342e4b83598e74b6ad61576ae4322a95b4e8
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diff --git a/Notebooks/imgs_chap5/img_exo_triangles.png b/Notebooks/imgs_chap5/img_exo_triangles.png
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