public override BlockType Rotated()
{
BlockCreater creater = new BlockCreater();
Block block = new Block();
string nextDirection = this.NextDierction(this.direction);
block = creater.CreateBlocks(TypeNumber, BlockList[0].color, nextDirection);
block.SetPoint(this.x, this.y);
block.direction = nextDirection;
return((BlockType)block);
} // change the dirction of a block, set new bolck to replace it