I am trying to create an “Electronic Minora” pattern (lighted candles in a 2d 32x8 matrix).

Here is a mapping functions which works as expected:

```
// Mapping for the 8x32 Matrix
// with vertical zigzagging
function (pixelCount)
{
width = 32 // Info, this value is not used
height = 8
var map = []
for (i = 0; i < pixelCount; i++)
{
x = Math.floor(i / height)
y = (i % height)
// y adjustment for vertical zigzag wiring
y = (x % 2) == 1 ? (height - 1 - y) : y
map.push([x, y])
}
return map
}
```

And here is my very simple test pattern:

```
export function beforeRender(delta) {
t1 = time(.1)
}
export function render2D(index, x, y)
{
h = 0.05
s = 1
if ((x == 0) && (y == 0))
{
v = 1
}
else
{
v = 0
}
hsv(h, s, v)
}
```

I can turn on only pixel with x = 0 and y = 0 coordinates.

Changing x and/or y to something other than 0 does not light up any led at all.

I assume, for the 32x8 matrix and mapping as shown above the x range is 32 (0:31) and y range is 8 (0:7) but this is not working as expected. If I use Index instead of x,y I can light up any led as expected.

What I am missing?