diff --git a/preload/main.py b/preload/main.py
index 7990f4cf4b623b3c32983987d19c8237582203bb..87da9f9f9448844ef732611ea97500348ee07f85 100644
--- a/preload/main.py
+++ b/preload/main.py
@@ -202,6 +202,8 @@ class Clock:
                         self.setTheme(self.theme + 1)
                         self.writeConfig()
 
+                utime.sleep_ms(250)
+
         except KeyboardInterrupt:
             for i in range(11):
                 leds.set(i, (0, 0, 0))