Merge pull request #101 from arturo182/patch-1

sequence: Add a function to play the previous animation

Author: FoamyGuy

adafruit_led_animation/sequence.py

@@ -179,6 +179,13 @@ def next(self):
             self.on_cycle_complete()
         self.activate(current % len(self._members))
 
+    def previous(self):
+        """
+        Jump to the previous animation.
+        """
+        current = self._current - 1
+        self.activate(current % len(self._members))
+
     def random(self):
         """
         Jump to a random animation.