added a fade_in effect to the knobs

main.py

@@ -18,6 +18,8 @@ class GuiMain:
         self.screenH = self.screen.get_height()
         self.screenW = self.screen.get_width()
 
+        self.label_surface = pygame.Surface((self.screenW, self.screenH), pygame.SRCALPHA)
+
         self.fx_mode_labels = [
             'Strings',
             'Beat',
@@ -74,8 +76,10 @@ class GuiMain:
         else: component.color = color_primary
 
     def set_fx_mode(self, mode):
+        self.knobs[self.fx_mode].opacity = 0
         self.fx_mode = self.fx_mode_labels.index(mode)
         self.knobs[self.fx_mode].set_focused(None)
+        self.knobs[self.fx_mode].fade_in = True
         for b in self.fx_mode_buttons:
             b.focused = (b.name == mode)
 
@@ -92,6 +96,9 @@ class GuiMain:
 
             # RENDER YOUR GAME HERE
 
+            self.screen.blit(self.label_surface, (0,0))
+            self.label_surface = pygame.Surface((self.screenW, self.screenH), pygame.SRCALPHA)
+
             self.knobs[self.fx_mode].display()
 
             for button in self.fx_mode_buttons: