# How To Forward chase (50% white) - Reverse chase (100%)

**URL:** <https://wled.discourse.group/t/how-to-forward-chase-50-white-reverse-chase-100/15583>\
**Category:** Questions\
**Created:** [October 26, 2026, 11:51am UTC](https://wled.discourse.group/t/how-to-forward-chase-50-white-reverse-chase-100/15583 "2026-10-26T11:51:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![retaxx](https://avatars.discourse-cdn.com/v4/letter/r/ecd19e/32.png) [@retaxx](https://wled.discourse.group/u/retaxx)\
**Post date:** [October 26, 2026, 11:51am UTC](https://wled.discourse.group/t/how-to-forward-chase-50-white-reverse-chase-100/15583/1 "2026-10-26T11:51:08Z")

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Hi everyone, I am planning a project with a 20-meter LED strip (96 LEDs/m, roughly 1920 LEDs total) controlled by WLED on an ESP32. I would like to implement a specific startup sequence and I am looking for the best way to achieve it.

When triggered by homeassistant, the LEDs should first run a forward chase from the beginning to the end, turning each LED on to 50% white brightness. Once it reaches the end, a reverse chase should run all the way back to the start, increasing the brightness of the LEDs to 100%. After this second pass finishes, the entire strip should stay permanently ON at full white brightness.

How would you recommend setting this up in WLED? spent a lot of time trying to set this up using standard Presets and Playlists, but I couldn’t get it to work properly. Maybe json api is the best way but also there i don’t get a positive result.  
Thanks in advance for any tips!

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**Author:** ![dedehai](https://yyz2.discourse-cdn.com/free1/user_avatar/wled.discourse.group/dedehai/32/7265_2.png) [@dedehai](https://wled.discourse.group/u/dedehai)\
**Post date:** [October 26, 2026, 6:03pm UTC](https://wled.discourse.group/t/how-to-forward-chase-50-white-reverse-chase-100/15583/2 "2026-10-26T18:03:36Z")

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use two overlapping segments and add them

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**Author:** ![retaxx](https://avatars.discourse-cdn.com/v4/letter/r/ecd19e/32.png) [@retaxx](https://wled.discourse.group/u/retaxx)\
**Post date:** [October 30, 2026, 5:57pm UTC](https://wled.discourse.group/t/how-to-forward-chase-50-white-reverse-chase-100/15583/3 "2026-10-30T17:57:40Z")

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I tried, but somehow it’s not working for me as expected. 😕

Could you perhaps create a playlist for me and then send the code so I can see what I’m doing wrong, or send a few pictures please?