Fading out (increasing transparency) Pygame Function Using set_alpha Not Working -

i'm trying make function fades out (increases transparency of) sprite overlay, large color block covers screen. however, reason, fade-in function works intended. fade-out function draws sprite overlay @ max opacity (255), doesn't show desired fade-out effect in spite of using same algorithm fade-in function does, though different range values, of course.

edit:

alright, think know deal here.

the fade-out function draws overlay on background... , leaves there keeps continuously drawing on moron.

i it.

i'm gonna toy around this.

here 2 functions:

this 1 works:

def fade_in(self):      self.faderinuse.add(self)      x in range(0, 256, self.rate):         self.colorfade.set_alpha(x)         screen.blit( self.colorfade, ( 0, 0 ) )         pygame.display.flip()         clock.tick(15)      self.faderinuse.clear( screen, screen )     drawscreen() 

this one, however, doesn't quite cut it:

def fade_out(self):      self.faderinuse.add(self)      x in range( 255, -1, ( self.rate * -1 ) ):         self.colorfade.set_alpha(x)         screen.blit( self.colorfade, ( 0, 0 ) )         pygame.display.flip()         clock.tick(15)      self.faderinuse.clear( screen, screen )     drawscreen() 

can show how u created self.colorfade object. and, did use self.colorfade.convert_alpha() ? have use convert_alpha able change alpha value of object.