diff --git a/halfway-presentation/langs.typ b/halfway-presentation/langs.typ
index fc26f5f..2cfcea9 100644
--- a/halfway-presentation/langs.typ
+++ b/halfway-presentation/langs.typ
@@ -4,16 +4,21 @@
     title: "Midas: mieux typer Python",
     subtitle: "Présentation intermédiaire",
     short-title: "Midas",
+    supervisor: "Superviseure",
     "context": "Contexte",
     problematic: "Problématique",
     case-1: [Cas 1 -- Type != sémantique],
     case-2: [Cas 2 -- Erreur de type _at runtime_],
     goal: "Objectif",
     gradual-typing: [Typage graduel (_gradual typing_)],
-    static-type-checking: [Vérification statique],
+    optional-typing: "Typage optionnel",
+    static-type-checking: "Vérification statique",
+    dynamic-checks: "Vérificiations dynamiques",
     runtime-assertions: [Assertions _at runtime_],
+    value-constraints: "Contraintes de valeur",
     example: "Exemple",
     lat-lon-error: "Invalide, même si float+float est valide",
+    planning: "Planification",
     initial-planning: "Planification initiale",
     week: "Semaine",
     objectives: "Objectifs",
@@ -40,16 +45,21 @@
     title: "Midas: better type checking in Python",
     subtitle: "Halfway presentation",
     short-title: "Midas",
+    supervisor: "Supervisor",
     "context": "Context",
     problematic: "Problematic",
     case-1: [Case 1 -- Type != semantic],
     case-2: [Case 2 -- Runtime type error],
     goal: "Goal",
     gradual-typing: "Gradual typing",
+    optional-typing: "Optional typing",
     static-type-checking: "Static type checking",
+    dynamic-checks: "Dynamic checks",
     runtime-assertions: "Runtime assertions",
+    value-constraints: "Value constraints",
     example: "Example",
     lat-lon-error: "Invalid, even though float+float is valid",
+    planning: "Planning",
     initial-planning: "Initial planning",
     week: "Week",
     objectives: "Objectives",
diff --git a/halfway-presentation/main.typ b/halfway-presentation/main.typ
index 1811841..2c2adc8 100644
--- a/halfway-presentation/main.typ
+++ b/halfway-presentation/main.typ
@@ -2,7 +2,9 @@
 #import "@preview/touying-unistra-pristine:1.4.3": *
 #import "@preview/codly:1.3.0": codly, codly-init
 #import "@preview/codly-languages:0.1.10": codly-languages
+#import "@preview/cetz:0.5.2": canvas, draw
 #import "langs.typ": i18n, i18n-date
+#import "utils.typ": title-slide
 
 #let langs = (
   fr: ("fr", "ch"),
@@ -74,9 +76,27 @@
 )
 
 #title-slide(
-  logo: image("logo_white.svg", height: 3em)
+  logo: image("logo_white.svg", height: 3em),
+  extra-body: place(
+    bottom + right,
+    dx: -2em,
+    dy: -2em
+  )[
+    #text(
+      fill: white,
+      weight: "bold"
+    )[#i18n("supervisor"): Dr D. Racordon]
+  ]
 )
 
+
+#focus-slide(
+  theme: "pink",
+  show-counter: false,
+)[
+  #i18n("context")
+]
+
 == #i18n("context")
 
 ==== #i18n("case-1")
@@ -84,13 +104,15 @@
 #[
 #set text(size: .8em)
 ```python
-df = pd.read_csv()
+df = pd.read_csv(...)
 value = df["distance"] / df["time"]
 ...
 value += df["age"]
 ```
 ]
 
+#pause
+
 ==== #i18n("case-2")
 
 #[
@@ -105,10 +127,12 @@ TypeError: unsupported operand type(s) for +: 'int' and 'NoneType'
 == #i18n("goal")
 
 - #i18n("gradual-typing")
-
-- #i18n("static-type-checking")
+  - #i18n("optional-typing")
+  - #i18n("static-type-checking")
+  - #i18n("dynamic-checks")
 
 - #i18n("runtime-assertions")
+  - #i18n("value-constraints")
 
 
 #let wah = place(
@@ -137,7 +161,7 @@ df: Frame[
     birth_date: date,
     height: float & (0 < _ < 250),
     name: Optional[str],
-    home: GeoLocation,
+    home: GeoCoordinate,
 ] = pd.read_csv(...)
 lat = df["home"].lat
 lon = df["home"].lon
@@ -145,6 +169,11 @@ invalid = lat + lon  # [[lat-lon-error]]
 ```
 ]
 
+#focus-slide(
+  theme: "yellow",
+  show-counter: false
+)[#i18n("planning")]
+
 == #i18n("initial-planning")
 
 #table(
@@ -181,6 +210,11 @@ invalid = lat + lon  # [[lat-lon-error]]
   [*9*],
 )
 
+#focus-slide(
+  theme: "neon",
+  show-counter: false
+)[#i18n("demo")]
+
 == #i18n("demo")
 
 === #i18n("def-custom-types")
@@ -217,3 +251,9 @@ speed += time  # [[invalid]]
 ```
 ]
 
+#focus-slide(
+  theme: "mandarine",
+  show-counter: false,
+)[
+  Questions ?
+]
\ No newline at end of file
diff --git a/halfway-presentation/utils.typ b/halfway-presentation/utils.typ
new file mode 100644
index 0000000..854e57b
--- /dev/null
+++ b/halfway-presentation/utils.typ
@@ -0,0 +1,100 @@
+#import "@preview/touying:0.6.2": *
+#import "@preview/touying-unistra-pristine:1.4.3": *
+
+// Redefine to allow extra-body
+#let title-slide(
+  title: "",
+  subtitle: "",
+  logo: "",
+  logos: (),
+  hide: (),
+  extra-body: [],
+  ..args,
+) = touying-slide-wrapper(self => {
+  let info = self.info + args.named()
+
+  let nb-logos = logos.len()
+
+  if logo != "" and nb-logos > 0 {
+    panic("'logo' and 'logos' cannot be set at the same time.")
+  }
+
+  let logo-body = none
+  if nb-logos == 0 {
+    logo-body = logo
+  } else {
+    logo-body = grid(
+      columns: if nb-logos > 0 {
+        nb-logos
+      } else {
+        1
+      },
+      ..(logos).map(logo => logo),
+    )
+  }
+
+  let body = {
+    set text(fill: white)
+    set block(inset: 0mm, outset: 0mm, spacing: 0em)
+    set align(top + left)
+    _gradientize(
+      self,
+      block(
+        fill: none,
+        width: 100%,
+        height: 100%,
+        inset: (left: 2em, top: 1em),
+        grid(
+          columns: 1fr,
+          rows: (6em, 6em, 4em, 4em),
+          logo-body,
+          _cell([
+            #text(size: 2em, weight: "bold", if (title != "") {
+              title
+            } else {
+              info.title
+            })
+            #linebreak()
+            #text(size: 1.7em, weight: "regular", if (subtitle != "") {
+              subtitle
+            } else {
+              info.subtitle
+            })
+          ]),
+
+          _cell([
+            #if ((none, "").all(x => x != info.subtitle)) {
+              linebreak()
+            }
+            #set text(size: 1.5em, fill: self.colors.white)
+            #text(weight: "bold", info.author)
+            #if "email" in info {
+              linebreak()
+              text(info.email, size: 0.8em)
+            }
+          ]),
+          if "date" not in hide {
+            _cell([
+              #set text(fill: self.colors.white.transparentize(25%))
+              #utils.display-info-date(self)
+            ])
+          },
+        ),
+      ),
+      c1: self.colors.nblue.E,
+      c2: self.colors.cyan.E,
+    )
+  }
+
+  self = utils.merge-dicts(
+    self,
+    config-common(freeze-slide-counter: true),
+    config-page(margin: 0em),
+    config-common(subslide-preamble: none),
+  )
+
+  touying-slide(
+    self: self,
+    body + extra-body,
+  )
+})
\ No newline at end of file