tweaked some groovy color effects, updated screeny. I think I might have added fog in this one too?

src/GL_Testing.cpp

@@ -113,7 +113,7 @@ void GL_Testing::create_buffers() {
 	glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 3 * sizeof(GLfloat), (GLvoid*)0);
 	glEnableVertexAttribArray(0);
 
-	glBindBuffer(GL_ARRAY_BUFFER, 0); // Note that this is allowed, the call to glVertexAttribPointer registered VBO as the currently bound vertex buffer object so afterwards we can safely unbind
+	glBindBuffer(GL_ARRAY_BUFFER, 0);
 
 	glBindVertexArray(0);
 }