# Flipcard (based on Topics/Textures/TextureQuad example) Front and Back

**URL:** <https://discourse.processing.org/t/flipcard-based-on-topics-textures-texturequad-example-front-and-back/37024>\
**Category:** Beginners\
**Created:** [May 22, 2022, 8:08pm UTC](https://discourse.processing.org/t/flipcard-based-on-topics-textures-texturequad-example-front-and-back/37024 "2022-05-22T20:08:30Z")\
**Posts on this page:** 1\
**Showing post:** 7

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**Author:** ![Gus\_Fermin](https://yyz2.discourse-cdn.com/flex036/user_avatar/discourse.processing.org/gus_fermin/32/5851_2.png) [@Gus\_Fermin](https://discourse.processing.org/u/Gus_Fermin)\
**Post date:** [May 23, 2022, 12:28am UTC](https://discourse.processing.org/t/flipcard-based-on-topics-textures-texturequad-example-front-and-back/37024/7 "2022-05-23T00:28:43Z")

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> [@glv](#):
>
> [createShape() / Reference / Processing.org](https://processing.org/reference/createShape_.html)

Thank you so much GLV!!! I think I understand it better now. As a side note / curiosity I noticed that in both, my example and your example, one of the PShapes has a black background slightly visible when it passes the 90 degrees angle. I do not know why, and only it is one of them. both of them have a transparent (no background) PNG as a texture… Do you happen to know why is that the case? find image below:

 ![Screen Shot 2022-05-22 at 8.23.11 PM](https://canada1.discourse-cdn.com/flex036/uploads/processingfoundation1/original/3X/b/0/b0cf4d5353f4f1181f10bf1b9570fbd7cb67ecc0.png)

Thank you again 🙂

PS: Your reply / help / didactic impulse that I was referring to in the initial msg of this thread is this one:

[using-pixels-array-over-points-trying-to-moving-pixels-xy-off-screen-like-points/24309](https://discourse.processing.org/t/using-pixels-array-over-points-trying-to-moving-pixels-xy-off-screen-like-points/24309)

It really blew my mind and opened up the pixels array for me. It is from 2020-10-05. 🙂

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