Device device;

void setup()
{
    device = Device();
}

Preset* Presets[];

Device::Device():
    NumPresets(numPresets),
    NumPatterns(numPatterns)
{
    *Presets = (Preset*)malloc(sizeof(Preset) * NumPresets);

    for (int p = 0; p < NumPresets; p++)
    {
        Presets[p] = new Preset("test", NumPixels, NumPatterns);
    }
}

Pattern* Patterns[];

Preset::Preset(char* name, int numPixels, int numPatterns):
    NumPatterns(numPatterns),
    NumPixels(numPixels)
{
    *Patterns = (Pattern*)malloc(sizeof(Pattern) * NumPatterns);

    for (int p = 0; p < NumPatterns; p++)
    {
        Patterns[p] = new Pattern(NumPixels);
    }
}

Pattern::Pattern(int numPixels): NumPixels(numPixels){  }