Update frontend.markdown (#3080)

* Update frontend.markdown add example of automation * Update frontend.markdown * Update frontend.markdown
2017-07-29 15:11:07 +01:00 · 2017-07-29 15:11:07 +01:00 · b2b36f0dda
commit b2b36f0dda
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--- a/source/_components/frontend.markdown
+++ b/source/_components/frontend.markdown
@ -36,3 +36,17 @@ The example above defined two themes named `happy` and `sad`. For each theme you
 There are 2 themes-related services:
 - `frontend.reload_themes` - reloads theme configuration from yaml.
 - `frontend.set_theme(name)` - sets backend-preferred theme name. 
+
+Example in automation:
+```yaml
+automation:
+  - alias: 'Set theme at startup'
+    initial_state: 'on'
+    trigger:
+     - platform: homeassistant
+       event: start
+    action:
+      service: frontend.set_theme
+      data:
+        name: pink
+```