Updating only part of a form

Hello!

I'm trying to make a form, with many buttons on it (see below). The first 15 buttons become active when they are clicked. Then there is the 'Incorrect' button and the 'Dubbel' button. If they are clicked, a value of 1 is added to the variables 'incorrect' and 'double', which are presented below on the left.

What I am trying to do, is updating only the variables shown below on the left (incorrect and dubbel) without reloading the whole form, because in that case you reset everything and the buttons you clicked before become inactive again.

Does anyone know a way to fix this?

Thank you in advance!
Jenna

My script in inline.script:

    from libopensesame import widgets

    class touch_button(widgets.button):


        def __init__(self, *arglist, **kwdict):



            widgets.button.__init__(self, *arglist, **kwdict)
            self._active = False

        def on_mouse_click(self, pos):

            # When the touch_button is active already, deactivate it
            if self._active == True:
                self._active = False
                var.correct -= 1

            # Otherwise, activate touch_button
            else:   
                self._active = True
                var.correct+=1

        def draw_frame(self, rect=None, style='normal'):

            """Draw a normal frame when active, and a plain frame otherwise."""

            if self._active:
                widgets.button.draw_frame(self, rect, style='normal')           
            else:
                widgets.button.draw_frame(self, rect, style='plain')

    class incorrect_button(widgets.button):
        def on_mouse_click(self,pos):
            var.incorrect+=1
        def draw_frame(self, rect=None, style='normal'):
            widgets.button.draw_frame(self, rect, style='plain')     

    class double_button(widgets.button):
        def on_mouse_click(self,pos):
            var.double+=1
        def draw_frame(self, rect=None, style='normal'):
            widgets.button.draw_frame(self, rect, style='plain') 

    ## Create a form   
    form = widgets.form(exp, cols=[1,1,1,1], rows=[1,1,1,1,1], margins=(50,50,50,50), spacing=10)   
    b1 = touch_button(form, text='Woord1')
    b2 = touch_button(form, text='Woord2')
    b3 = touch_button(form, text='Woord3')
    b4 = touch_button(form, text='Woord4')
    b5 = touch_button(form, text='Woord5')
    b6 = touch_button(form, text='Woord6')
    b7 = touch_button(form, text='Woord7')
    b8 = touch_button(form, text='Woord8')
    b9 = touch_button(form, text='Woord9')
    b10 = touch_button(form, text='Woord10')
    b11 = touch_button(form, text='Woord11')
    b12 = touch_button(form, text='Woord12')
    b13 = touch_button(form, text='Woord13')
    b14 = touch_button(form, text='Woord14')
    b15 = touch_button(form, text='Woord15')
    tekst = widgets.label(form, text=tekst_incorrect)
    incorrect = incorrect_button(form, text='Incorrect')
    dubbel = double_button(form, text='Dubbel')
    nextButton = widgets.button(form, text='Volgende')

    form.set_widget(b1, (0,0))
    form.set_widget(b2, (1,0))
    form.set_widget(b3, (2,0))
    form.set_widget(b4, (3,0))
    form.set_widget(b5, (0,1))
    form.set_widget(b6, (1,1))
    form.set_widget(b7, (2,1))
    form.set_widget(b8, (3,1))
    form.set_widget(b9, (0,2))
    form.set_widget(b10, (1,2))
    form.set_widget(b11, (2,2))
    form.set_widget(b12, (3,2))
    form.set_widget(b13, (0,3))
    form.set_widget(b14, (1,3))
    form.set_widget(b15, (2,3))
    form.set_widget(tekst, (0,4))
    form.set_widget(incorrect, (1,4))
    form.set_widget(dubbel, (2,4))
    form.set_widget(nextButton, (3,4))
    form._exec()