You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: bsb.m
    path of file: ./repos/Algorithms_MathModels/《MATLAB神经网络原理与实例精解》随书附带源程序/第9章 反馈神经网络
    
    the code of the file until where you have to start completion: function c=bsb(x,beta,multi)
% function C=bsb(x,beta)
% This m-file duplicates the Brain State in a Box Experiment.

    
function c=bsb(x,beta,multi)
% function C=bsb(x,beta)
% This m-file duplicates the Brain State in a Box Experiment.
% Input:
% x    : input vector 
% beta : feedback factor
% Output:
% c    : number of iterations required for convergence
% Hugh Pasika 1997

hold on 
flag=0;
x=x(:);
c=2;        % c is a general purpose counter
W=[0.035 -.005;
    -.005 .035];
% set axes
set(gca,'YLim',[-1 1]);
set(gca,'XLim',[-1 1]);
% plot first point
plot(x(1),x(2),'ob')
orig=x';
% plot center lines
plot([0,0],[1,-1],'-')
plot([1,-1],[0,0],'-')
% label plot
set(gca,'YTick',[-1 1]);
set(gca,'XTick',[-1 1]);

while flag<1
    y=x+beta*W*x;
    x=(y(:,:)<-1)*(-1)+(y(:,:)>1)+(y(:,:)>-1 & y(:,:)<1).*y;
    u(c,:)=x';
    c=c+1;
    if u(c-1,:)==u(c-2,:),
        flag=10;
        c=c-3;
    end