# Use of hidden sink

**URL:** <https://cl.desmos.com/t/use-of-hidden-sink/7712>\
**Category:** Questions\
**Created:** [January 30, 2025, 1:40am UTC](https://cl.desmos.com/t/use-of-hidden-sink/7712 "2025-01-30T01:40:36Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![squesad1](https://avatars.discourse-cdn.com/v4/letter/s/57b2e6/32.png) [@squesad1](https://cl.desmos.com/u/squesad1)\
**Post date:** [January 30, 2025, 1:40am UTC](https://cl.desmos.com/t/use-of-hidden-sink/7712/1 "2025-01-30T01:40:36Z")

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I have a “math response” with this code of …

showSubmitButton: this.submitCount\<1  
disableEdit: not(this.submitCount=0)

if response is false I would like a second “math response” (in other words a second attempt) to appear, otherwise I want it hidden if first response is true. What does the hidden sink look like?

I have this hidden code for the second “math response” as…

hidden: when not(system2.submitted) true otherwise false

which causes the second “math response” to appear regardless of first “math response” entry

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**Author:** ![Guzman\_Tierno](https://yyz1.discourse-cdn.com/flex031/user_avatar/cl.desmos.com/guzman_tierno/32/6149_2.png) [@Guzman\_Tierno](https://cl.desmos.com/u/Guzman_Tierno)\
**Post date:** [January 30, 2025, 3:51pm UTC](https://cl.desmos.com/t/use-of-hidden-sink/7712/2 "2025-01-30T15:51:49Z")

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Hello …  
here’s a basic idea of how to make it work:  
[https://teacher.desmos.com/activitybuilder/custom/679b9edb9cc39a6c13bc1698](https://teacher.desmos.com/activitybuilder/custom/679b9edb9cc39a6c13bc1698)