Simple program to help me practice violin

musical.qml

import QtQuick 1.1

Rectangle {
    width: 360; height: 360

    Text {
        id: pitch

        anchors.centerIn: parent
        width: parent.width; height: parent.height
        horizontalAlignment: Text.AlignHCenter
        verticalAlignment: Text.AlignVCenter
        font.pointSize: parent.height / 2

        property variant pitchs: ["Dó", "Ré", "Mi", "Fá", "Sol", "Lá", "Si"]
    }

    Timer {
        interval: 2000; running: true; repeat: true
        property string str: ""
        onTriggered: {
            do {
                str = pitch.pitchs[Math.ceil(Math.random() * 7)]
            } while (str == pitch.text)
            pitch.text = str
        }
    }

    MouseArea {
        anchors.fill: parent
        onClicked: {
            Qt.quit();
        }
    }
}