Plotting within a nested for loop

Hello I can't see to find the problem within code. I need to plot the corresponding x2 value for all 20 iterations.

x2=0:1:10;
y=0:1:10;

hold on
for j = 1:20                                                 
    for k = 1:length(x2)                                   
        m = randi([0 1]);
        if m == 0
            x2(k) = x2(k) + 1;    
        else
            x2(k) = x2(k) - 1;    
        end
    plot(x2(k),y)
    end
end

Answer 1

[the cyclist]

I'm guessing you wanted something like

plot(x2,y,'.')    

or possibly

plot(x2,y)