diff --git a/TODO.md b/TODO.md
index e8865e7..9960bf0 100644
--- a/TODO.md
+++ b/TODO.md
@@ -28,7 +28,7 @@
 - [x] **`cow_university`**
   - [x] Cow says prime numbers up to `n`.
 - [x] **`smart_cow`**
-  - [ ] Cow says a simple arithmetic expression (e.g., "3+11"), eyes show the result.
+  - [x] Cow says a simple arithmetic expression (e.g., "3+11"), eyes show the result.
 - [x] **`crazy_cow`**
   - [x] Create a "crazy arithmetic cow" script with something unusual or complex.
 
@@ -39,13 +39,13 @@
 - [x] **`newcow.c`**
   - [x] Create `affiche_vache` function: displays a cow without a speech bubble.
   - [x] Compile and run.
-- [ ] **Add Features**
+- [x] **Add Features**
   - [x] Support `-e`/ `--eyes` option to change cow's eyes.
-  - [ ] Implement other options from `cowsay` manpage.
-- [ ] **New Feature**
-  - [ ] Implement a new feature (e.g., `--tail L` to adjust tail length, or display a herd).
+  - [x] Implement other options from `cowsay` manpage.
+- [x] **New Feature**
+  - [x] Implement a new feature (e.g., `--tail L` to adjust tail length, or display a herd).
 - [x] **`wildcow`**
-  - [~] Test and explain `update()` and `gotoxy()`.
+  - [-] Test and explain `update()` and `gotoxy()`.
   - [x] Create an animated cow using `update()`, `gotoxy()`, and `sleep()`.
 - [x] **`reading_cow`**
   - [x] Cow "reads" a file character by character, displaying each in its mouth before "swallowing".
@@ -54,30 +54,30 @@
 
 ## 5. Automata (Cow-Tamagotchi)
 
-- [ ] **Design**
-  - [ ] Draw an automaton for cow's health states: `liferocks`, `lifesucks`, `byebyelife`.
-  - [ ] Assume fixed `fitness`, `digestion`, and `stock`.
-- [ ] **`tamagoshi_cow.c`**
-  - [ ] Reuse `affiche_vache` to display cow's health state.
-  - [ ] Initialize `stock` and `fitness` to 5.
-  - [ ] Create `stock_update()` and `fitness_update()` functions.
-  - [ ] Main loop:
-    - [ ] Display cow's state.
-    - [ ] Display `stock`.
-    - [ ] Prompt for `lunchfood`.
-    - [ ] Update `stock` and `fitness`.
-    - [ ] Increment `duree_de_vie`.
-  - [ ] End game at `byebyelife`, display score.
+- [x] **Design**
+  - [x] Draw an automaton for cow's health states: `liferocks`, `lifesucks`, `byebyelife`.
+  - [x] Assume fixed `fitness`, `digestion`, and `stock`.
+- [x] **`tamagoshi_cow.c`**
+  - [x] Reuse `affiche_vache` to display cow's health state.
+  - [x] Initialize `stock` and `fitness` to 5.
+  - [x] Create `stock_update()` and `fitness_update()` functions.
+  - [x] Main loop:
+    - [x] Display cow's state.
+    - [x] Display `stock`.
+    - [x] Prompt for `lunchfood`.
+    - [x] Update `stock` and `fitness`.
+    - [x] Increment `duree_de_vie`.
+  - [x] End game at `byebyelife`, display score.
 
 ---
 
 ## 6. Report
 
-- [ ] Format: plain text, Markdown, Org, or LaTeX.
-- [ ] Include:
-  - [ ] Source code.
-  - [ ] Execution outputs for relevant test cases.
-  - [ ] Comments in code and report: justify choices, ideas, challenges.
-  - [ ] Highlight original and advanced implementations.
+- [x] Format: plain text, Markdown, Org, or LaTeX.
+- [x] Include:
+  - [x] Source code.
+  - [x] Execution outputs for relevant test cases.
+  - [x] Comments in code and report: justify choices, ideas, challenges.
+  - [x] Highlight original and advanced implementations.
 
 ---
diff --git a/cowsay.tar.gz b/cowsay.tar.gz
deleted file mode 100644
index ab0ad8f..0000000
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