# Help with Turtle Extension block definition

**URL:** <https://forum.makecode.com/t/help-with-turtle-extension-block-definition/6335>\
**Category:** Arcade\
**Created:** [February 24, 2021, 4:15pm UTC](https://forum.makecode.com/t/help-with-turtle-extension-block-definition/6335 "2021-02-24T16:15:53Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**Author:** ![Mr-Coxall](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/mr-coxall/32/513_2.png) [@Mr-Coxall](https://forum.makecode.com/u/Mr-Coxall)\
**Post date:** [February 25, 2021, 3:37am UTC](https://forum.makecode.com/t/help-with-turtle-extension-block-definition/6335/5 "2021-02-25T03:37:15Z")

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I just want to confirm that you think it might be possible to do with a default value to the image and then assign it to the sprite?

I did find this about “[Hidden Blocks](https://forum.makecode.com/t/how-to-make-an-extension/4225/13)”. I could get hidden blocks working, but once I tried it with Sprites, I couls not get it working.

Thanks

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