timer with graph in qml

[Sunil kumar verma]

timer with graph in qml .

timer was not match with stop watch after 3000 x axis
and interval is 10milisecond.

please help me how resolve??
import QtQuick 2.15
import QtQuick.Window 2.15
import QtCharts 2.3
Window {
width: 1000
height: 480
visible: true
title: qsTr("Hello World")
property int xx: 0
property int yy: 0
property int zz: 0
property real aa: 00
property real bb: 20
//property int point11: 0

Rectangle {
    width: 1000
    height: 300

    ChartView {
        id: chart
        anchors.fill: parent

        // Define the chart axes
        ValueAxis {
            id: valueAxis
            min: 0
            max: 10
            titleText: "ValueY"
        }
        ValueAxis {
            id: valueAxisX
            min: 0
            max: 1000
            tickCount: 11
            titleText: "ValueX"
        }

        LineSeries {
            id: series
            axisX: valueAxisX
            axisY: valueAxis
            name: "Series"
        }
        Timer {
            id: timer
            interval: 10
            running: true
            repeat: true
            property int amountOfData: 0
            onTriggered: {

                 aa++
                 bb = Math.random() * 10;
                console.log(aa)

// series.append(aa,bb)
if(amountOfData>valueAxisX.max)
{
valueAxisX.max++
valueAxisX.min++
}
else
{
amountOfData++
}

            }
        }
    }
}

}