QML object change from c++ class for Gomoku game - c++

Question

I am trying to make a Gomoku game using qml and c++. I have created a 10 * 10 board using qml grid and repeater. like this....
Window {
width: 640
height: 480
visible: true
color: "#241d2b"
title: qsTr("Hello World")
Grid {
x: 10; y: 10
width: 418
height: 418
property bool defineColor: true
rows: 10; columns: 10; spacing: 2
Repeater {
model: 100
Rectangle {
width: 40; height: 40
color: "white"
MouseArea{
anchors.fill: parent
TapHandler{
id:tapped
onTapped: ghuti.visible = uiBridge.showLog(index)
}
}
Rectangle {
id: ghuti
visible: false
radius: width*0.5
anchors.fill: parent
anchors.rightMargin: 5
anchors.leftMargin: 5
anchors.bottomMargin: 5
anchors.topMargin: 5
//anchors.fill: parent
color: "red"
}
Rectangle {
id: ghuti2
visible: false
radius: width*0.5
anchors.fill: parent
property string property0: "none.none"
anchors.rightMargin: 5
anchors.leftMargin: 5
anchors.bottomMargin: 5
anchors.topMargin: 5
//anchors.fill: parent
color: "black"
}
}
}
}
}
The human input can be easily captured by mouse click...but in reply, computer need to turn. But I do not find and clue for automatic computer turn in right place. The two rectangles inside the loop ...one is for human input and other is for computer input.`