please correct TV-L2 inpainting code

i make image inpaint code with TV-L2. but this code dont show pic how can i chage to work code.

 %
u=imread("pic.jpg")
lalambda = 0.5;
epsilon = 0.001;
p = 0.0005; 
N = 2000; 
u = ub;
for i = 1:N
    [ux,uy]  = grad(u);
    normgrad = sqrt(ux.^2+uy.^2+epsilon^2);
    u = u - p*(u-ub-lambda*div(ux./normgrad,uy./normgrad));
end
figure(3);imshow(u,[]);