diff --git a/include/gravity_block.hpp b/include/gravity_block.hpp
index e6c3013..27378a0 100644
--- a/include/gravity_block.hpp
+++ b/include/gravity_block.hpp
@@ -14,6 +14,8 @@ public:
 
 private:
     GravityDirection gravity_direction;
+    sf::Sprite icon_sprite;
+    float opacity;
     bool used;
 
 protected:
@@ -38,9 +40,9 @@ public:
     virtual Object::Ptr clone() const;
 
     /**
-     * Prépare les textures avant le dessin du bloc
+     * Dessin du bloc dans la fenêtre donnée
      */
-    virtual void prepareDraw(ResourceManager& resources);
+    virtual void draw(Level& level);
 
     /**
      * Appelé lorsque le bloc de gravité est activé par un objet
diff --git a/include/utility.hpp b/include/utility.hpp
new file mode 100644
index 0000000..8bb4e25
--- /dev/null
+++ b/include/utility.hpp
@@ -0,0 +1,12 @@
+#ifndef __SKIZZLE_UTILITY_HPP__
+#define __SKIZZLE_UTILITY_HPP__
+
+namespace Utility {
+    /**
+     * Permet d'animer la valeur donnée vers la valeur cible
+     * avec la vitesse donnée
+     */
+    float animateValue(float current, float speed, float goal);
+}
+
+#endif
diff --git a/res/textures/gravity_block_east.tga b/res/textures/gravity_block_east.tga
index 9943dc4..42108fe 100644
Binary files a/res/textures/gravity_block_east.tga and b/res/textures/gravity_block_east.tga differ
diff --git a/res/textures/gravity_block_north.tga b/res/textures/gravity_block_north.tga
index f2f1cff..b09c9ae 100644
Binary files a/res/textures/gravity_block_north.tga and b/res/textures/gravity_block_north.tga differ
diff --git a/res/textures/gravity_block_south.tga b/res/textures/gravity_block_south.tga
index 7fe699b..a9a530b 100644
Binary files a/res/textures/gravity_block_south.tga and b/res/textures/gravity_block_south.tga differ
diff --git a/res/textures/gravity_block_west.tga b/res/textures/gravity_block_west.tga
index b205f2c..551ec4c 100644
Binary files a/res/textures/gravity_block_west.tga and b/res/textures/gravity_block_west.tga differ
diff --git a/src/block.cpp b/src/block.cpp
index 13acec6..87e4584 100644
--- a/src/block.cpp
+++ b/src/block.cpp
@@ -7,6 +7,9 @@
 const unsigned int Block::TYPE_ID = 2;
 
 Block::Block() : Object() {
+    sprite.setOrigin(sf::Vector2f(23, 23));
+    select_sprite.setOrigin(sf::Vector2f(23, 23));
+
     aabb = sf::FloatRect(
         -Manager::GRID / 2,
         -Manager::GRID / 2,
@@ -45,10 +48,7 @@ void Block::prepareDraw(ResourceManager& resources) {
     }
 
     sprite.setTexture(resources.getTexture(texture_name));
-    sprite.setOrigin(sf::Vector2f(23, 23));
-
     select_sprite.setTexture(resources.getTexture("block_select.tga"));
-    select_sprite.setOrigin(sf::Vector2f(23, 23));
 }
 
 void Block::draw(Level& level) {
diff --git a/src/editor.cpp b/src/editor.cpp
index d9f628c..7e39a6e 100644
--- a/src/editor.cpp
+++ b/src/editor.cpp
@@ -398,6 +398,15 @@ void Editor::removeObject(Object::Ptr object) {
         selection.begin(), selection.end(), object
     ), selection.end());
 
+    // si c'était un joueur, il faut renuméroter
+    // les autres pour plus de convenance
+    if (object->getTypeId() == Player::TYPE_ID) {
+        // on réattribue les numéros de joueurs
+        for (unsigned int i = 0; i < getPlayers().size(); i++) {
+            getPlayers()[i]->setPlayerNumber(i);
+        }
+    }
+
     Level::removeObject(object);
 }
 
diff --git a/src/gravity_block.cpp b/src/gravity_block.cpp
index f0cc5d3..65acda7 100644
--- a/src/gravity_block.cpp
+++ b/src/gravity_block.cpp
@@ -1,18 +1,22 @@
-#include "resource_manager.hpp"
+#include "manager.hpp"
+#include "utility.hpp"
 #include "gravity_block.hpp"
 #include "game.hpp"
 
 const unsigned int GravityBlock::TYPE_ID = 3;
 
-GravityBlock::GravityBlock() : Block(), used(false) {}
+GravityBlock::GravityBlock() : Block(), opacity(255), used(false) {
+    icon_sprite.setOrigin(sf::Vector2f(23, 23));
+}
+
 GravityBlock::~GravityBlock() {}
 
 Object::Ptr GravityBlock::clone() const {
     return Object::Ptr(new GravityBlock(*this));
 }
 
-void GravityBlock::prepareDraw(ResourceManager& resources) {
-    Block::prepareDraw(resources);
+void GravityBlock::draw(Level& level) {
+    // sélectionne le sprite d'icône
     std::string texture_name = "gravity_block_";
 
     switch (gravity_direction) {
@@ -33,7 +37,20 @@ void GravityBlock::prepareDraw(ResourceManager& resources) {
         break;
     }
 
-    sprite.setTexture(resources.getTexture(texture_name + ".tga"));
+    // on dessine le bloc normal
+    Block::draw(level);
+
+    // on anime l'opacité de l'icône
+    opacity = Utility::animateValue(opacity, 2, used ? 0 : 255);
+    icon_sprite.setColor(sf::Color(255, 255, 255, opacity));
+
+    // on dessine l'icône
+    icon_sprite.setTexture(level.getResourceManager().getTexture(
+        texture_name + ".tga"
+    ));
+
+    icon_sprite.setPosition(getPosition());
+    level.getWindow().draw(icon_sprite);
 }
 
 void GravityBlock::activate(Game& game, Object::Ptr object) {
diff --git a/src/level.cpp b/src/level.cpp
index ae27ae7..242f957 100644
--- a/src/level.cpp
+++ b/src/level.cpp
@@ -2,6 +2,7 @@
 #include "level.hpp"
 #include "player.hpp"
 #include "block.hpp"
+#include "utility.hpp"
 #include "gravity_block.hpp"
 #include "switch_block.hpp"
 #include "finish_block.hpp"
@@ -285,15 +286,10 @@ void Level::draw() {
     sf::Vector2u window_size = window.getSize();
 
     // animation de la rotation de la caméra
-    float goal = std::fmod((float) gravity_direction * 90, 360);
-    float diff = goal - camera_angle;
-    float speed = diff * Manager::FRAME_TIME.asSeconds() * 5;
-
-    if (std::abs(diff) < .05f) {
-        camera_angle = goal;
-    } else {
-        camera_angle += speed;
-    }
+    camera_angle = Utility::animateValue(
+        camera_angle, 5,
+        std::fmod((float) gravity_direction * 90, 360)
+    );
 
     camera.setRotation(camera_angle + 180);
     window.setView(camera);
@@ -497,11 +493,6 @@ void Level::removeObject(Object::Ptr object) {
         players.erase(std::remove(
             players.begin(), players.end(), player
         ), players.end());
-
-        // on réattribue les numéros de joueurs
-        for (unsigned int i = 0; i < players.size(); i++) {
-            players[i]->setPlayerNumber(i);
-        }
     }
 
     // on supprime l'objet de la liste d'objets
diff --git a/src/utility.cpp b/src/utility.cpp
new file mode 100644
index 0000000..401722e
--- /dev/null
+++ b/src/utility.cpp
@@ -0,0 +1,15 @@
+#include "utility.hpp"
+#include "manager.hpp"
+#include <cmath>
+
+float Utility::animateValue(float current, float speed, float goal) {
+    float gap = goal - current;
+    float diff = gap * Manager::FRAME_TIME.asSeconds() * speed;
+
+    // si on est très proches de la fin, on termine
+    if (std::abs(gap) < .05f) {
+        return goal;
+    }
+
+    return current + diff;
+}