diff --git a/core/theme.py b/core/theme.py
index 5b5efff..305442f 100644
--- a/core/theme.py
+++ b/core/theme.py
@@ -116,6 +116,12 @@ class Theme(object):
 
         if not type(value) in (list, dict):
             value = self.__keywords.get(value, value)
+
+        if isinstance(value, list):
+            key = '__{}-idx__'.format(key)
+            idx = widget.get(key, 0)
+            widget.set(key, (idx + 1) % len(value))
+            value = value[idx]
         self.__current[key] = value
         return value
 
diff --git a/doc/NOTES.md b/doc/NOTES.md
index 4440fe5..f729d3e 100644
--- a/doc/NOTES.md
+++ b/doc/NOTES.md
@@ -35,3 +35,4 @@
 - themes: use colors to improve theme readability
 - brightness: read from CLI tools
 - input: use events?
+- themes: rotating icons (battery!)