Hi guys, I'm coding littles games for the french exclusive ti82 advanced (which is almost a 95x63 black and white ti83 without asm fonctions because it had to fit with french exams (big bulshit))

Anyway I try to make a program based on pxl detection to detect colision and It always tell me "err domain" I tryed to figure out why but even with calculators indications I can't figure out why the error is there … Also I copy/ past this from ti connect ce so the code is in french, just know that Pxl-changer is Pxl-change, (…..]Naff is (…..)off, grad is scl, ou is or and that's almost all I think

```
* CoordNAff
* QuadNAff
* AxesNAff
* ÉtiqNAff
* ExprNAff
* FoncNAff
* 20→Y
* 20→X
* 1→Xmin
* 95→Xmax
* 1→Ymin
* 63→Ymax
* 1→Xgrad
* 1→Ygrad
*
* 100→S
* Repeat S≤0
*
* Vertical 2
* Vertical 92
* Horizontal 2
* Horizontal 60
* getKey→K
* Pxl-Changer(Y+1,X
* Pxl-Changer(Y-1,X
* Pxl-Changer(Y,X+1
* Pxl-Changer(Y,X-1
*
*
* pxl-Test(Y+1,X)→S
* pxl-Test(Y-1,X)→Z
* pxl-Test(Y,X+1)→D
* pxl-Test(Y,X-1)→Q
*
*
*
* If Z=0 ou S=0 ou Q=0 ou D=0
* Then
* S-1→S
* 1→O
* Else
* 0→O
* End
*
*
*
*
*
* If K=25 et Z=1
* Then
* Y-1→Y
* End
* If K=24 et Q=1
* Then
* X-1→X
* End
* If K=26 et D=1
* Then
* X+1→X
* End
* If K=34 et S=1
* Then
* Y+1→Y
* End
*
*
* End
```

I know this isn't optimized at all but now it's not the subject, I just want to know why this whole thing is broken, thanks you :)