start.qml

import QtQuick 2.15
import QtQuick.Controls 2.15

ApplicationWindow {
    visible: true
    width: 1920
    height: 1080
    title: "HelloApp"
    flags: Qt.FramelessWindowHint | Qt.Window | Qt.WindowStaysOnTopHint
    onClosing: close.accepted = false
    property string currTime: "0"
    property QtObject backend
    Rectangle {
        anchors.fill: parent
                color: "Green"
      }
}