diff --git a/shader/include/scene.glsl b/shader/include/scene.glsl
index 33be62c..57324d0 100644
--- a/shader/include/scene.glsl
+++ b/shader/include/scene.glsl
@@ -2,14 +2,10 @@ RayHit trace(Ray ray)
 {
     RayHit hit = createRayHit();
 
-    Sphere s;
-    s.cr = vec4(0.0,0.0,0.0,5.0);
-    s.albedo = vec3(1.0,0.0,0.0);
-    s.material = MAT_CHROME;
-    intersectSphere(ray, hit, s);
-
+    // floor
     intersectPlane(ray, hit, vec3(0.0,-1.5,0.0),vec3(0.0,1.0,0.0));
 
+    // spheres
     for (int i = 0; i < _activeSpheres; i++)
     {
         intersectSphere(ray, hit, _spheres[i]);
diff --git a/src/sphere.c b/src/sphere.c
index 7a1d8f8..08c625f 100644
--- a/src/sphere.c
+++ b/src/sphere.c
@@ -13,20 +13,33 @@ void makeSpheres(struct Sphere *spheres, int count, float t)
         {1.0,1.0,1.0}
     };
 
-    // distance from center
-    float d = 6.0;
-    float radius = 0.5;
-    float x;
     vec3 sc = {0.0,0.0,1.0};
 
-    for (int i = 0; i < count; i++)
+    int sphereIdx = 0;
+
+    // a shiny sphere in the middle which bobs around
+    int middleSpheres = 1;
+    sc[0] = 2.5*sin(t*2.67);
+    sc[1] = 1.5+sin(t*1.09);
+    sc[2] = 2.5*cos(-t*2.13);
+    float radius = 1.7;
+    vec3 col = {0.0,0.0,0.0};
+    spheres[sphereIdx++] = makeSphere(sc,radius,col,1);
+
+    // rainbow spheres
+    int rainbowSpheres = count - middleSpheres;
+    // distance from center
+    float d = 6.0;
+    radius = 0.5;
+    float x;
+    for (int i = 0; i < rainbowSpheres; i++)
     {
-        x = 2.0*CGLM_PI * (float)i/(float)count;
+        x = 2.0*CGLM_PI * (float)i/(float)rainbowSpheres;
         sc[0] = sin(x)*d;
         sc[1] = sin(x*3.0-5.0*sin(t));
         sc[2] = cos(x)*d;
 
-        float ic = i/(float)count*CGLM_PI*2.0;
+        float ic = i/(float)rainbowSpheres*CGLM_PI*2.0;
         float r = sin(ic);
         float g = sin(ic+CGLM_PI/1.5);
         float b = sin(ic+2.0*CGLM_PI/1.5);
@@ -35,8 +48,8 @@ void makeSpheres(struct Sphere *spheres, int count, float t)
         glm_vec3_scale(col, 0.5, col);
         glm_vec3_adds(col, 0.5, col);
 
-        int material = i % 2 == 0;
-        spheres[i] = makeSphere(sc,radius,col,material);
+        int material = 0;
+        spheres[sphereIdx++] = makeSphere(sc,radius,col,material);
     }
 }