counter = 1;
posnx1 = 0;
posny1 = 0;

steps  = 30;
threshx = 0.5;
threshy = 0.5;

for i = 1:steps
    plot(posnx1,posny1,'o')
    set(gca,'XLim',[-15 15])
    set(gca,'YLim',[-15 15])
    F(i) = getframe;
    tmp = rand(2,1);
    if tmp(1,1) > threshx
        posnx1 = posnx1 + 1;
    else
        posnx1 = posnx1 - 1;
    end
    
    if tmp(2,1) > threshy
        posny1 = posny1 + 1;
    else
        posny1 = posny1 - 1;
    end
    
end