diff --git a/src/cube.c b/src/cube.c
index 533950f..8fbffb0 100644
--- a/src/cube.c
+++ b/src/cube.c
@@ -5,15 +5,13 @@
 void cube(int etat) {
     static GLuint cube = 0, proc_id = 0;
 
-    static GLclampf r = 0,
-                    g = 0,
-                    b = 0;
+    static GLclampf rgb[3] = { 0 };
 
     switch(etat) {
         case GL4DH_INIT:
-            r = rand() / (float)RAND_MAX;
-            g = rand() / (float)RAND_MAX;
-            b = rand() / (float)RAND_MAX;
+            for(int i = 0; i < 3; ++i) {
+                rgb[i] = rand() / (float)RAND_MAX;
+            }
 
             cube = gl4dgGenCubef();
             proc_id = gl4duCreateProgram("<vs>shaders/cube.vs", "<fs>shaders/cube.fs", NULL);
@@ -44,7 +42,7 @@ void cube(int etat) {
             break;
 
         case GL4DH_DRAW:
-            glClearColor(r, g, b, 1.f);
+            glClearColor(rgb[0], rgb[1], rgb[2], 1.f);
             static GLfloat cube_rotation = 0;
             glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
             glUseProgram(proc_id);
diff --git a/src/cube2.c b/src/cube2.c
index c798ef2..4e68de1 100644
--- a/src/cube2.c
+++ b/src/cube2.c
@@ -5,15 +5,13 @@
 void cube2(int etat) {
     static GLuint cube = 0, proc_id = 0;
 
-    static GLclampf r = 0,
-                    g = 0,
-                    b = 0;
+    static GLclampf rgb[3] = { 0 };
 
     switch(etat) {
         case GL4DH_INIT:
-            r = rand() / (float)RAND_MAX;
-            g = rand() / (float)RAND_MAX;
-            b = rand() / (float)RAND_MAX;
+            for(int i = 0; i < 3; ++i) {
+                rgb[i] = rand() / (float)RAND_MAX;
+            }
 
             cube = gl4dgGenCubef();
             proc_id = gl4duCreateProgram("<vs>shaders/cube.vs", "<fs>shaders/cube.fs", NULL);
@@ -44,7 +42,7 @@ void cube2(int etat) {
             break;
 
         case GL4DH_DRAW:
-            glClearColor(r, g, b, 1.f);
+            glClearColor(rgb[0], rgb[1], rgb[2], 1.f);
             static GLfloat cube_rotation = 0;
             glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
             glUseProgram(proc_id);