private void setTargetPosition()
{
int x = RandomUtil.GetInt(TARGET_AREA_SIZE - 1);
int y = RandomUtil.GetInt(TARGET_AREA_SIZE - 1);
bool isUpper = RandomUtil.GetBool();
bool isLeft = RandomUtil.GetBool();
int verticalAreaStart = isUpper ? 0 : SIZE - TARGET_AREA_SIZE;
int horizontalAreaStart = isLeft ? 0 : SIZE - TARGET_AREA_SIZE;
TargetPosition = new Point(verticalAreaStart + x, horizontalAreaStart + y);
}