private void PickRandomSimpleBlock(LevelObject l)
{
int rand = Random.Range(0, 3);
switch (rand)
{
case 0:
l.AddBottomBlock();
break;
case 1:
l.AddMiddleBlock();
break;
case 2:
l.AddTopBlock();
break;
case 3:
l.AddWall();
break;
}
}