# Common errors?

**URL:** <https://forum.makecode.com/t/common-errors/22543>\
**Category:** Arcade\
**Created:** [September 18, 2023, 4:45am UTC](https://forum.makecode.com/t/common-errors/22543 "2023-09-18T04:45:22Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![Vegz78](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/vegz78/32/1201_2.png) [@Vegz78](https://forum.makecode.com/u/Vegz78)\
**Post date:** [September 18, 2023, 9:03pm UTC](https://forum.makecode.com/t/common-errors/22543/7 "2023-09-18T21:03:29Z")

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[Predifened variables, if-statements, conditionals etc., defined hidden outside of main.ts, not appearing in the toolbox or can only be used as the infamous and omnifeared _grey blocks_…](https://forum.makecode.com/t/material-for-teaching-basic-programming-concepts/22487/2)

[Speaking of which…](https://forum.makecode.com/t/makecode-memes/21457/98) 😉

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