# NightLight (angular and linear sync)

**URL:** <https://discourse.threejs.org/t/nightlight-angular-and-linear-sync/46757>\
**Category:** Resources\
**Tags:** selective-bloom, rotation\
**Created:** [January 10, 2023, 10:46pm UTC](https://discourse.threejs.org/t/nightlight-angular-and-linear-sync/46757 "2023-01-10T22:46:58Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![prisoner849](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/prisoner849/32/535_2.png) [@prisoner849](https://discourse.threejs.org/u/prisoner849)\
**Post date:** [January 10, 2023, 10:46pm UTC](https://discourse.threejs.org/t/nightlight-angular-and-linear-sync/46757/1 "2023-01-10T22:46:58Z")

</div>

Hi community!

Picture:

 ![изображение](https://canada1.discourse-cdn.com/flex035/uploads/threejs/original/3X/1/4/14670b68149559bc525827c29c5187ce767486c0.jpeg)

**Demo: [https://codepen.io/prisoner849/full/VwBPEJO](https://codepen.io/prisoner849/full/VwBPEJO)**

This is an attempt to build a system of two pulleys with a transmission belt. Visually, belt’s linear speed is synchronized with angular speed of the pulleys.