A quick and dirty hack using two scenes and Rule Machine "triggered" via Alexa (using wake word "computer" and the stock Alexa response). I wish I could have had a .75s delay between the on and off scene. Listen with sound to appreciate the effect.
I have a similar thing on my goodnight routine that locks the house up, it does red alert then the shields up sound lmao. No clue why Amazon has these sounds built into Alexa.
The LED strips are Sylvania Lightify RGBW Zigbee. Two of the starter kit with the controller - the undercabinet and overcabinet strips are separately controlled. I paid only $32 for them 6 months ago, but they've almost doubled.