diff --git a/code.py b/code.py
index cc24f28..162942c 100644
--- a/code.py
+++ b/code.py
@@ -4,12 +4,13 @@
 # Using Adafruit USB_HID Library : https://github.com/adafruit/Adafruit_CircuitPython_HID/releases
 #
 # Buttons default mapping 
-# Red = F
-# Green = G
-# Blue = H
-# Black = I
+# Red = Del/E
+# Green = Spacebar/Return
+# Blue = Right arrow/Up
+# Yellow = Left arrow/Down
+# Black = Esc/R
 #  
-# Yellow on : multimedia mode
+# Switch on : Alt mode
 #
 # Forked from 
 # DroneBot Workshop 2021
@@ -20,30 +21,27 @@ import board
 import digitalio
 import usb_hid
 
-# Regulare keys 
+# Regular keys 
 from adafruit_hid.keyboard import Keyboard
 from keyboard_layout_win_fr import KeyboardLayout
 from keycode_win_fr import Keycode
 
-# multimedia keys 
-# ~ from adafruit_hid.consumer_control import ConsumerControl
-# ~ from adafruit_hid.consumer_control_code import ConsumerControlCode
-# ~ cc = ConsumerControl(usb_hid.devices)
+# When in ALT mode, buttons use an alternative keycode.
+ALT = False
 
 # KB setup
 keyboard = Keyboard(usb_hid.devices)
 keyboard_layout = KeyboardLayout(keyboard) 
 
 # Buttons setup
-# Change GPIOs according to HW 
 buttons_gpio = {
-#   name                GPIO             Keycode           State    DigitalIO   (switch)
-    "red"   : dict(gpio=board.GP18, keycode=Keycode.D, state=False, DIO=None), 
-    "green" : dict(gpio=board.GP19, keycode=Keycode.N, state=False, DIO=None), 
-    "blue"  : dict(gpio=board.GP16, keycode=Keycode.J, state=False, DIO=None), 
-    "black" : dict(gpio=board.GP20, keycode=Keycode.E, state=False, DIO=None), 
-    "yellow": dict(gpio=board.GP17, keycode=Keycode.B, state=False, DIO=None), 
-    "switch": dict(gpio=board.GP21, keycode=Keycode.LEFT_SHIFT, state=False, DIO=None, switch_setup=dict(gpio=board.GP7, DIO=None))
+#   name                GPIO             Keycode_1               Keycode_2(ALT mode)           State        DigitalIO   (switch)
+    "red"   : dict(gpio=board.GP18, keycode_1=Keycode.DELETE,     keycode_2=Keycode.E,         state=False, DIO=None), 
+    "green" : dict(gpio=board.GP19, keycode_1=Keycode.SPACEBAR,   keycode_2=Keycode.RETURN,    state=False, DIO=None), 
+    "blue"  : dict(gpio=board.GP16, keycode_1=Keycode.RIGHT_ARROW, keycode_2=Keycode.DOWN_ARROW,  state=False, DIO=None), 
+    "black" : dict(gpio=board.GP20, keycode_1=Keycode.ESCAPE,     keycode_2=Keycode.R,         state=False, DIO=None), 
+    "yellow": dict(gpio=board.GP17, keycode_1=Keycode.LEFT_ARROW,keycode_2=Keycode.UP_ARROW,state=False, DIO=None), 
+    "switch": dict(gpio=board.GP21, keycode_1=None, keycode_2=None,              state=False, DIO=None, switch_setup=dict(gpio=board.GP7, state=False, DIO=None))
 }
 
 # GPIO setup
@@ -60,14 +58,32 @@ btn_scan_delay = 1/200
 
 while True:
     for btn in buttons_gpio:
+        # If digital input is high and was not pressed previously
         if buttons_gpio[btn]['DIO'].value and not buttons_gpio[btn]['state']:
-            keyboard.press(buttons_gpio[btn]['keycode'])
-            buttons_gpio[btn]['state'] = not buttons_gpio[btn]['state']
+            if ALT:
+                if buttons_gpio[btn]['keycode_2'] is not None:
+                    keyboard.press(buttons_gpio[btn]['keycode_2'])
+            else:
+                if buttons_gpio[btn]['keycode_1'] is not None:
+                    keyboard.press(buttons_gpio[btn]['keycode_1'])
+            buttons_gpio[btn]['state'] = True
+            # Turn light on, turn ALT mode on
             if 'switch_setup' in buttons_gpio[btn]:
-                buttons_gpio[btn]['switch_setup']['DIO'].value = True
+                if not buttons_gpio[btn]['switch_setup']['DIO'].value:
+                    buttons_gpio[btn]['switch_setup']['DIO'].value = True
+                    ALT = True
+        # If digital input is down and was pressed previously
         if not buttons_gpio[btn]['DIO'].value and buttons_gpio[btn]['state']:
-            keyboard.release(buttons_gpio[btn]['keycode'])
-            buttons_gpio[btn]['state'] = not buttons_gpio[btn]['state']
+            if ALT:
+                if buttons_gpio[btn]['keycode_2'] is not None:
+                    keyboard.release(buttons_gpio[btn]['keycode_2'])
+            else:
+                if buttons_gpio[btn]['keycode_1'] is not None:
+                    keyboard.release(buttons_gpio[btn]['keycode_1'])
+            buttons_gpio[btn]['state'] = False
+            # Turn light off, turn ALT mode off
             if 'switch_setup' in buttons_gpio[btn]:
-                buttons_gpio[btn]['switch_setup']['DIO'].value = False
-    time.sleep(btn_scan_delay)
\ No newline at end of file
+                if buttons_gpio[btn]['switch_setup']['DIO'].value:
+                    buttons_gpio[btn]['switch_setup']['DIO'].value = False
+                    ALT = False
+    time.sleep(btn_scan_delay)
diff --git a/readme.md b/readme.md
index ecef33f..c9036ba 100644
--- a/readme.md
+++ b/readme.md
@@ -3,19 +3,18 @@
 ![Outside](./picote-outside.jpg)
 ![Inside](./picote-inside.jpg)
 
-Use a rpi pico and push buttons to send key strokes to a computer.
+Utiliser un [raspberry pi pico](https://www.raspberrypi.com/products/raspberry-pi-pico/) et des bouttons d'arcade pour simuler des touches de clavier.
 
-This is the companion project to the [Stopi](/arthus/stopi) stop-motion software.  
+Ce projet est le compagnon de [Stopi2](/arthus/stopi2).  
 
-## Software setup
+## Installation
 
- 1. Upload 'code.py' and the 'lib' folder to the rpi pico
- 2. Done
+Copier le fichier 'code.py' et le répertoire 'lib' à la base du pico.
 
-## Hadware setup
+## Matériel nécessaire
 
- * 5 push buttons
- * 1 ON/OFF switch with indicator light or a separate LED
- * 1 330Ω resistor
+ * 5 bouttons poussoirs
+ * 1 switch ON/OFF avec une LED intégrée ou en supplément.
+ * 1 rsistance 330Ω 
 
 ![The crude diagram](./picote-s.jpg)
\ No newline at end of file