public ViewModel()
{
VisibleBlocks.Add(new ObservableCollection <Block>());
VisibleBlocks.Add(new ObservableCollection <Block>());
VisibleBlocks.Add(new ObservableCollection <Block>());
VisibleBlocks.Add(new ObservableCollection <Block>());
for (int x = 0; x < 4; x++)
{
for (int y = 0; y < 4; y++)
{
VisibleBlocks[x].Add(new Block());
}
Blocks.AddRange(VisibleBlocks[x]);
}
RandomBlock();
RandomBlock();
}