How can I change statebutton value?

When I push button, I want to output my value on editfield.

And I did it, but I can't change my value when I pressed it again.

Here is my code,

app.Button_9.BackgroundColor = 'g';       %I want to change button's background color when I pressed it,       
if sb.Value == 1;
app.EditField.Value = num2str(1)
else sb.Value == 0;
app.EditField.Value = num2str(2)          %Actually, I want to reset the value when I pressed again, but I can't. 
end

It means, I want to change my editfield value 1 to 0 when I pushed state button, and turn background color off.

Please help me

[Adam Danz]

Try this

if sb.Value == 1;
    app.Button_9.BackgroundColor = 'g';       
elseif sb.Value == 0;
    app.Button_9.BackgroundColor = [.5 .5 .5]; % or whatever the default color is     
end
app.EditField.Value = num2str(sb.Value); 

[jiwon ham]

I've been struggling with it for a day, but I've solved it thanks to you.

Thankyou for your help :)