add random lambda effect with randomness

blaue_lichterkette.yaml

@@ -33,6 +33,15 @@ light:
     output: pwm_output
     name: "Blaue Lichterkette"
     id: blaue_lichterkette
+    effects:
+      - lambda:
+          name: "My Random Lambda Effect with Randomness"
+          update_interval: 3s
+          lambda: |-
+            auto call = id(blaue_lichterkette).turn_on();
+            call.set_transition_length(3000);
+            call.set_brightness(0.5 + random_float() * 0.5);
+            call.perform();
 
 binary_sensor:
   - platform: gpio