diff --git a/CMakeLists.txt b/CMakeLists.txt
index b6f3adf..5e3e91b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,7 +24,7 @@ set(ASSETS_fx
   assets-fx/planes.png
   assets-fx/bground.png
   assets-fx/mutations.png
-  assets-fx/piece.png
+  assets-fx/cursor.png
   assets-fx/title.png
   assets-fx/mutations_table/abilities_1.txt
   assets-fx/mutations_table/abilities_2.txt
diff --git a/Plague.g1a b/Plague.g1a
index d6987f5..1175150 100644
Binary files a/Plague.g1a and b/Plague.g1a differ
diff --git a/assets-fx/cursor.png b/assets-fx/cursor.png
new file mode 100644
index 0000000..c16cb9b
Binary files /dev/null and b/assets-fx/cursor.png differ
diff --git a/assets-fx/piece.png b/assets-fx/piece.png
deleted file mode 100644
index d0c2a63..0000000
Binary files a/assets-fx/piece.png and /dev/null differ
diff --git a/assets-fx/pieces.png b/assets-fx/pieces.png
deleted file mode 100644
index 985aedf..0000000
Binary files a/assets-fx/pieces.png and /dev/null differ
diff --git a/assets-fx/planes.png b/assets-fx/planes.png
index fae3c21..5995dc0 100644
Binary files a/assets-fx/planes.png and b/assets-fx/planes.png differ
diff --git a/src/core.c b/src/core.c
index e66e00b..063c56c 100644
--- a/src/core.c
+++ b/src/core.c
@@ -1,3 +1,5 @@
+#include <gint/timer.h>
+#include <gint/clock.h>
 #include <gint/keyboard.h>
 
 #include "core.h"
@@ -45,13 +47,7 @@ void next_frame(struct game *current_game)
 
 int get_inputs(const int background, int *mutation_menu)
 {
-    int opt = GETKEY_DEFAULT & ~GETKEY_REP_ARROWS;
-    int timeout = 1;
-
-    key_event_t ev = getkey_opt(opt, &timeout);
-    if(ev.type == KEYEV_NONE) return background;
-
-    int key = ev.key;
+    int key = rtc_key();
 
     if (key == KEY_OPTN && (background == 1 || background == 2)) return (background % 2) + 1;
     if (key == KEY_VARS) return 3;
@@ -98,15 +94,55 @@ int get_inputs(const int background, int *mutation_menu)
 }
 
 
+int rtc_key(void)
+{
+    int opt = GETKEY_DEFAULT & ~GETKEY_REP_ARROWS;
+    int timeout = 1;
+        
+    key_event_t ev = getkey_opt(opt, &timeout);
+    if(ev.type == KEYEV_NONE) return 0;
+        
+    return ev.key;
+}
+
+
+int callback_tick(volatile int *tick)
+{
+    *tick = 1;
+    return TIMER_CONTINUE;
+}
+
+
 void manage_mutation(struct game *current_game, const int mutation_menu)
 {
     int key = 0, end = 0;
-    int cursor_x = 1, cursor_y = 1;
-    while (!end)
-    {
-        display_mutation(current_game, mutation_menu, cursor_x, cursor_y);
-        key = getkey().key;
+    struct cursor c = {0, 0, 0};
 
+    static volatile int tick = 1;
+    int t = timer_configure(TIMER_ANY, CURSOR_TICK*1000, GINT_CALL(callback_tick, &tick));
+    if (t >= 0) timer_start(t);
+
+
+    while (!end)
+    {   
+        // Cursor blinking gestion
+        while (!tick) sleep();
+        tick = 0;
+        c.display = (c.display + 1) % 2;
+
+        // Display the mutation menu
+        display_mutation(current_game, mutation_menu, c);
+        
+        // Get the key
+        key = rtc_key();
+        
         if (key == KEY_EXIT) end = 1;
+
+        
+        if (key == KEY_LEFT && c.x > 0) c.x--;
+        if (key == KEY_RIGHT && c.x < 7) c.x++;
+        if (key == KEY_UP && c.y > 0) c.y--;
+        if (key == KEY_DOWN && c.y < 3) c.y++;
     }
+    if (t >= 0) timer_stop(t);
 }
diff --git a/src/core.h b/src/core.h
index 87a3f51..cf93a01 100644
--- a/src/core.h
+++ b/src/core.h
@@ -1,9 +1,9 @@
 #ifndef _PLAGUE_CORE_H
 #define _PLAGUE_CORE_H
 
-
 // Duration for internal clock
 #define ENGINE_TICK 50
+#define CURSOR_TICK 200
 
 // Number of planes on screen
 #define NB_PLANES 5
@@ -11,7 +11,6 @@
 // Number of humans
 #define TOTAL_POP 10000000000
 
-
 // game : all statistics of the current game
 struct game
 {
@@ -38,7 +37,6 @@ struct game
     struct plane *planes[NB_PLANES + 1];
 };
 
-
 // plane : information about planes
 struct plane
 {
@@ -51,20 +49,35 @@ struct plane
     // Coordinates of the plane's destination
     int dest_x, dest_y;
 
-    //Coordinates of the plane's departure
+    // Coordinates of the plane's departure
     int depa_x, depa_y;
 
 };
 
+//cursor : cursor information for mutations selection
+struct cursor
+{
+    // Cursor's coordinates
+    int x, y;
+
+    // If the cursor should be displayed
+    int display;
+};
+
 // get_inputs : detect and manage inputs
 int get_inputs(const int background, int *mutation_menu);
 
-
 // next_frame : compute the plane's positions
 void next_frame(struct game *current_game);
 
+// rtc_key : get the key with RTC system
+int rtc_key(void);
+
+// callback_timer : basic timer
+int callback_tick(volatile int *tick);
 
 // manage_mutation : an independant sub-programm which allow to select, buy and see the mutations.
 void manage_mutation(struct game *current_game, const int mutation_menu);
 
+
 #endif /* _PLAGUE_CORE_H */
\ No newline at end of file
diff --git a/src/display_engine.c b/src/display_engine.c
index 4d4ac48..3fae5b4 100644
--- a/src/display_engine.c
+++ b/src/display_engine.c
@@ -79,10 +79,10 @@ void display_foreground(const int background, const struct game *current_game)
 }
 
 
-void display_mutation(const struct game *current_game, const int mutation_menu, const int cursor_x, const int cursor_y)
+void display_mutation(const struct game *current_game, const int mutation_menu, const struct cursor c)
 {
     extern const bopti_image_t img_mutations;
-    extern bopti_image_t img_piece;
+    extern bopti_image_t img_cursor;
 
     // Load symptoms
     extern struct mutation_table mt_symptoms_1;
@@ -122,14 +122,15 @@ void display_mutation(const struct game *current_game, const int mutation_menu,
     }
 
     dclear(C_WHITE);
+    display_background(5);
     for (int i = 0 ; i < 4 ; i++)
     {
         for (int j = 0 ; j < 8; j++)
         {
-            if (table[i][j]) dsubimage(i*16, j*16, &img_mutations, 16 * (mutation_menu - 1), 0, 16 * (table[i][j] - 1), 15, 15);
+            if (table[i][j]) dsubimage(j*16, i*16, &img_mutations, 16 * (mutation_menu - 1), 16 * (table[i][j] - 1), 15, 15, DIMAGE_NONE);
         }
     }
-    dimage(16 * (cursor_x - 1), 16 * (cursor_y - 1), &img_piece);
+    dsubimage((16 * c.x) - 1, (16 * c.y) - 1, &img_cursor, 0, 17 * (c.display), 17, 17, DIMAGE_NONE);
     dupdate();
 
 }
diff --git a/src/display_engine.h b/src/display_engine.h
index ffe944e..e9c7e9c 100644
--- a/src/display_engine.h
+++ b/src/display_engine.h
@@ -8,7 +8,7 @@ void display_background(const int background);
 void display_foreground(const int background, const struct game *current_game);
 
 // display_mutation : display the mutation selection screen
-void display_mutation(const struct game *current_game, const int mutation_menu, const int cursor_x, const int cursor_y);
+void display_mutation(const struct game *current_game, const int mutation_menu, const struct cursor c);
 
 // init_mat : copy src into dest
 void init_mat(int x, int y, int dest[][x], int src[][x]);
diff --git a/src/main.c b/src/main.c
index abb3ba2..7d94cbc 100644
--- a/src/main.c
+++ b/src/main.c
@@ -19,9 +19,6 @@ static void title_screen(void);
 // main_loop : display background, foreground and manage inputs
 void main_loop(struct game *current_game);
 
-// callback_timer : basic timer
-int callback_tick(volatile int *tick);
-
 
 int main(void)
 {
@@ -117,9 +114,3 @@ void main_loop(struct game *current_game)
     if (t >= 0) timer_stop(t);
 }
 
-
-int callback_tick(volatile int *tick)
-{
-    *tick = 1;
-    return TIMER_CONTINUE;
-}