public TortoiseCompiler AddRotateCommand(string angle)
    {
        float         a             = float.Parse(angle);
        RotateCommand rotateCommand = new RotateCommand(a);

        _commands.Add(rotateCommand);

        return(this);
    }
    public TortoiseCompiler AddRotateCommand(string angle)
    {
        float a = float.Parse(angle);
        RotateCommand rotateCommand = new RotateCommand(a);

        _commands.Add(rotateCommand);

        return this;
    }