diff --git a/software/webradio.py b/software/webradio.py
index 69636d2..98b6bec 100644
--- a/software/webradio.py
+++ b/software/webradio.py
@@ -27,8 +27,8 @@ class display(object):
 
 	def get_image(self):
 		self.img.save("/tmp/wr/frame%d.png" % self.dbg)
-		self.img.tobytes()
 		self.dbg += 1
+		return self.img.tobytes()
 
 class display_playback(display):
 	def __init__(self):
@@ -112,9 +112,9 @@ class display_manager(object):
 
 	def get_image(self):
 		if (self.current_display):
-			self.current_display.get_image()
+			return self.current_display.get_image()
 		else:
-			print("TODO: return empty image")
+			return []
 
 	def animate(self, ticks):
 		old_tick = self.tick