Get Response in Experiment

Hi guys,

I'm trying to make an experiment in which after a second interval I need the participant to respond using either the left or right arrow button. I have the response function from someone else (see 'getaresponse.m' below) and I just can't figure out where in the code of my experiment to put it. I think it really shouldn't be that hard, but I've tried just about everything now and hope someone can help. (: Oh, and I'm using PsychToolbox.

function counterclockresponse = getaresponse;

while 1
  [keyisdown,when,keyCode] = KbCheck;
  if keyisdown
    if strcmp(KbName(keyCode),'left') % left arrow
      counterclockresponse = 1;
      break;
    elseif strcmp(KbName(keyCode),'right') % right arrow
      counterclockresponse = 0;
            break
        elseif strcmp(KbName(keyCode),'q') % q button
            counterclockresponse = 0;
            screen closeall;
      return;
    end
  end
end

I was thinking it should be something like this (posting the entire code would be far to much, so if you need any other parts let me know, but I hope this will suffice):

      %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
      %%%%%%%%%show the 2nd interval %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
      %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

      for frame = 1:presentationframes
          Screen('DrawTexture', w, tex2,sr,dst);
          fixationcross(w,fixvhdim,linewidth,screenrect);
          Screen('Flip', w);

      end

      % erase the screen
      Screen(w,'fillrect',backgroundcolor);
      writetexttoscreen(w,responsetext,screenrect); 
 !!!  counterclockresponse = getaresponse;
      Screen('Flip', w);

end

Screen closeall;

ShowCursor;

Many thanks in advance.

~Nastasia