QList change color of rectangle in QML

[TMJJ001]

Dears,

I think I want to do something very simple, but it seems like I can not figure out how to do so.
I have a QList<bool> param variable with 31 values.

Now when value 17 is true, I want to change the color of the rectangle in QML.

class BackendQml : public QObject
{
    Q_OBJECT
    Q_PROPERTY(QList<bool> param READ param WRITE setParam NOTIFY paramChanged)


public:
    explicit BackendQml(QObject *parent = nullptr);
    QList<bool> param() const{return m_param;}



signals:
    void paramChanged(QList<bool> param);


public slots:
    void setParam(QList<bool> param);

private:
 
        QList<bool> m_param;

};

#endif // BACKENDQML_H

Now in my qml file I want to do something like:

if(backendQml.param[17] == true)
{
     rectangle.color = "red";
}
else
{
    rectangle.color = "blue";
}

Could somebody help me out with this?

Thanks in advance,
Kind regards

[dheerendra]

Your code should work as it. Do you see any issue ?

[TMJJ001]

@dheerendra thsnls for your reponse.
But how do I get the onChanged of param to run the if statements?
Thanks