void ImportTrail()
    {
        listPos = WriteFileUtil.ListFromJson <Vector3>("Assets/Json/test.json");

        trail.Clear();
        for (int i = 0; i < listPos.Count; i++)
        {
        }
    }
 void ImportPositions()
 {
     listPos         = WriteFileUtil.ListFromJson <Vector3>("Assets/Json/test.json");
     player.position = listPos[listPos.Count - 1];
 }