How to control flag on MATLAB?

The following code is what I'm expecting but only the transmit part which displays "Transmit" three times every 2 seconds.

While the period until the exit of the for loop, I would like to continue the plotData function and once exit the for loop, I hope to stop the execution of the plot function as well.

How can I change the following code?

How can I continue to plot while the flag, "stat", is true, and stop to plot when the flag is false?

%data
global accumulateData
 
%status
global stat
stat = true;
if(stat == true)
    %h = addlistener(s, 'DataAvailable', @plotData);
    h =  @plotData;  
end
 
%Transmit 3 times every 2 seconds
for i = (1:3)-1
 
    if i == 3
        fprintf("end\n");
        pause(2)
        stat = false;
        exit();
    end
    fprintf("Transmit\n");
    pause(2);
end
 
 
function plotData(src, event)
   %plot(event.TimeStamps, event.Data);
   fprintf("plot\n");
end

%output
>> untitled
Transmit
Transmit
Transmit