# Pausing and playing a slider with action button

**URL:** https://cl.desmos.com/t/pausing-and-playing-a-slider-with-action-button/4022
**Category:** Questions
**Created:** [February 4, 2022, 10:48pm UTC](https://cl.desmos.com/t/pausing-and-playing-a-slider-with-action-button/4022 "2022-02-04T22:48:16Z")
**Posts on this page:** 2
**Page:** 1

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### Author: ![Keristen\_Raccio](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/keristen_raccio/32/3334_2.png) [@Keristen\_Raccio](https://cl.desmos.com/u/Keristen_Raccio)
#### Post date: [February 4, 2022, 10:48pm UTC](https://cl.desmos.com/t/pausing-and-playing-a-slider-with-action-button/4022/1 "2022-02-04T22:48:16Z")

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I am making an activity involving particle motion along the x-axis. Is is possible to allow the students to “pause” and “play” the slider controlling the particle with the action button?

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### Author: ![Daniel\_Grubbs](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/daniel_grubbs/32/719_2.png) [@Daniel\_Grubbs](https://cl.desmos.com/u/Daniel_Grubbs)
#### Post date: [February 5, 2022, 12:43am UTC](https://cl.desmos.com/t/pausing-and-playing-a-slider-with-action-button/4022/2 "2022-02-05T00:43:24Z")

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If you define any of the animation sinks/sources in the CL, a playhead will appear on the graph.