diff --git a/SQCSim2021/engine.cpp b/SQCSim2021/engine.cpp
index 7f24df8..7d3d913 100644
--- a/SQCSim2021/engine.cpp
+++ b/SQCSim2021/engine.cpp
@@ -193,8 +193,19 @@ void Engine::Render(float elapsedTime) {
 	m_player.ApplyTransformation(skybox, false); // Version d'ApplyTransformation qui ne tient compte que de la rotation 
 												// (donc l'objet ne bouge pas relativement au joueur, ce qui est pratique pour une skybox!).
 	
+	static BlockType bloc = 1;
+
+	if (m_mouseWU) bloc++;
+	else if (m_mouseWD) bloc--;
+	if (bloc == BTYPE_LAST)
+		bloc = BTYPE_DIRT;
+	else if (bloc == BTYPE_AIR)
+		bloc = BTYPE_LAST - 1;
+
+	m_mouseWU = m_mouseWD = false;
+
 	if (m_mouseL)
-		m_world.ChangeBlockAtCursor(BTYPE_DIRT, m_player, m_block);
+		m_world.ChangeBlockAtCursor(bloc, m_player, m_block);
 	else if (m_mouseR)
 		m_world.ChangeBlockAtCursor(BTYPE_AIR, m_player, m_block);