# Light Stack flashing **URL:** \ **Category:** Support, Troubleshooting, & Help\ **Created:** [April 16, 2021, 7:02am UTC](https://community.tulip.co/t/light-stack-flashing/2470 "2021-04-16T07:02:20Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![FahdERM](https://avatars.discourse-cdn.com/v4/letter/f/ce7236/32.png) [@FahdERM](https://community.tulip.co/u/FahdERM)\ **Post date:** [April 16, 2021, 7:02am UTC](https://community.tulip.co/t/light-stack-flashing/2470/1 "2021-04-16T07:02:20Z")
Hi Guys, Any one know how can i make one of the light stack leds’ flashs every 1 or 2 seconds? In fact, this is what i want to do : Red fix : Error Flashing red : Needs Help Green fix : Okay thank you, ---
**Author:** ![gio](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tulip.co/gio/32/82_2.png) [@gio](https://community.tulip.co/u/gio)\ **Post date:** [April 16, 2021, 8:11pm UTC](https://community.tulip.co/t/light-stack-flashing/2470/2 "2021-04-16T20:11:23Z")
hello @FahdERM, great question!! have you considered using NodeRED on an [Edge MC](https://support.tulip.co/en/articles/4078672-technical-specifications-for-edge-mc) for this use case?? based on what I’m understanding, you should be able to achieve this. ---
**Author:** ![FahdERM](https://avatars.discourse-cdn.com/v4/letter/f/ce7236/32.png) [@FahdERM](https://community.tulip.co/u/FahdERM)\ **Post date:** [June 7, 2021, 12:21pm UTC](https://community.tulip.co/t/light-stack-flashing/2470/3 "2021-06-07T12:21:05Z")
Hi @gio, i have just ordered an Edge MC for the test. So, do you have an example on how to do that or any thing that would help me? thank you, ---
**Author:** ![gio](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tulip.co/gio/32/82_2.png) [@gio](https://community.tulip.co/u/gio)\ **Post date:** [June 7, 2021, 12:52pm UTC](https://community.tulip.co/t/light-stack-flashing/2470/4 "2021-06-07T12:52:10Z")
hello @FahdERM, I would recommend starting taking a look at some of the posts here on Tulip Community: [March 2021 App Competition [Node-RED]](https://community.tulip.co/t/march-2021-app-competition-node-red/1961) and posting on the NodeRED Community: [https://discourse.nodered.org/](https://discourse.nodered.org/). I will also mention that since [this](https://community.tulip.co/t/light-stack-flashing/2470/2) was posted, there have been some updates in Tulip allowing you to have faster Triggers (up to 1 second) if you’d like: [Different timers - #8 by RMDecker](https://community.tulip.co/t/different-timers/1555/8). would you like for me to enable this on your instance?? if so, can you send me your instance URL via Direct Message?? thanks!! ---
**Author:** ![jzwierzchowskimmc](https://avatars.discourse-cdn.com/v4/letter/j/9dc877/32.png) [@jzwierzchowskimmc](https://community.tulip.co/u/jzwierzchowskimmc)\ **Post date:** [June 15, 2021, 3:38pm UTC](https://community.tulip.co/t/light-stack-flashing/2470/5 "2021-06-15T15:38:26Z")
@gio Is there a way using existing functions and triggers to blink a light in the ANDON light stack, while on a certain step? I would like to get to have a light blink on the pull steps of my AQL app to help get the attention of the operator. ---
**Author:** ![gio](https://sea2.discourse-cdn.com/flex020/user_avatar/community.tulip.co/gio/32/82_2.png) [@gio](https://community.tulip.co/u/gio)\ **Post date:** [June 15, 2021, 3:58pm UTC](https://community.tulip.co/t/light-stack-flashing/2470/6 "2021-06-15T15:58:00Z")
hello @jzwierzchowskimmc, have you considered adding two triggers that fire every second and alternate the lightstack between on an off?? you would need a Variable that toggles so you know whether to turn the light on or off. I do not have a Gateway available to demo this, but logic similar to this should work great: ![Screen Shot 3](https://us1.discourse-cdn.com/flex020/uploads/agilemfg/original/2X/7/7315679ac2a411d4510a62cd2cb17dc149198c7d.jpeg) ![Screen Shot 4](https://us1.discourse-cdn.com/flex020/uploads/agilemfg/original/2X/2/20ba90aaf32b16b81e2f767cdf0afc1441bf1587.jpeg) let us know if you’re able to implement this!! ---
**Author:** ![jzwierzchowskimmc](https://avatars.discourse-cdn.com/v4/letter/j/9dc877/32.png) [@jzwierzchowskimmc](https://community.tulip.co/u/jzwierzchowskimmc)\ **Post date:** [June 15, 2021, 8:01pm UTC](https://community.tulip.co/t/light-stack-flashing/2470/7 "2021-06-15T20:01:57Z")
@gio Thanks! IT should have the gateway configured by tomorrow hoping that it’ll work. I will let you know if I run into any issues.