Break A While loop using a status Button

Hello, I am trying to break the while loop containing that for loop by using the 1 and 0 status of the status button. I am having an issue doing it. That's my code below. Any other ideas to break a while 1 loop would be appreciated. Thank you!

 % Value changed function: CANSTARTButton
        function CANSTARTButtonValueChanged(app, event)
            value = app.CANSTARTButton.Value;
            app.CANSTARTButton.Value = 0;
            app.CANSTARTButton.Enable = true;
            
            while 1
                %add code here
                app.CANMSGStatusLamp.Color = 'Blue'; 
                for v = 1.0:-0.2:0.0
                    disp(v)
                end
                %%end
                if (app.CANSTARTButton.Value == 1)
                    app.CANMSGStatusLamp.Color = 'red';
                    break;
                end
            end
            app.CANSTARTButton.Value = 0;
            app.CANSTARTButton.Enable = false;         
            %if (value==1)
             %   app.CANMSGStatusLamp.Color = 'red';
              %  while 1
            %else
             %   app.CANMSGStatusLamp.Color = 'Green';
            %end
        end
    end

Answer 1

[Jan]

Insert a drawnow command inside the loop to let Matlab update the GUI.

A small simplification:

app.CANMSGStatusLamp.Color = 'Blue';
while app.CANSTARTButton.Value == 0
    %add code here 
    for v = 1.0:-0.2:0.0
        disp(v)
    end
    
    drawnow;
end
app.CANMSGStatusLamp.Color = 'red';

[Mohamed Afify]

Never knew about the drawnow, worked fine thank you so much!