Matlab Wireless Network Simulation code

In below code to simulate a node on Wireless networks.

clc
clear all
close all
warning off

net_width = 10;
net_height = 80;
check = 1;
tot_nodes = 20;
traves_MS = 10;
hT = 4;


% Form Network area....
node_count = 1;
all_x = [];
all_y = [];
for j = 0:9:net_height
    if check==1
        start = 0;
        check = 0;
    else
        start = 5;
        check = 1;
    end
    for i = start:10.3:net_height
        circle([j,i],6,7,'-');
        hold on
        drawnow
        plot(j,i,j,i,'.','color','green');
        nodes(node_count).x = j;
        nodes(node_count).y = i;
        nodes(node_count).id = node_count;
        node_count = node_count+1;
        all_x = [all_x;i];
        all_y = [all_y;j];
    end
end
axis square;

min_x = min(all_x);
max_x = max(all_x);

min_y = min(all_y);
max_y = max(all_y);


% Making Random nodes....
for i = 1:tot_nodes
    x = round(min_x+(max_x-min_x)*rand);
    y = round(min_y+(max_y-min_y)*rand);
    pnt1 = [x y] ;
    best_node_inx = best_dist(pnt1,nodes);
    best_x = nodes(best_node_inx).x;
    best_y = nodes(best_node_inx).y;
    best_pnt = [best_x best_y];
    
    plot(x,y,x,y,'*','color','red');
    all_x = [pnt1(1) best_pnt(1)];
    all_y = [pnt1(2) best_pnt(2)];
    plot(all_x,all_y);
    hold on
    drawnow
end 


% Making Moving Nodes...
s_min_x = min_x+0.5;
s_min_y = min_y+0.5;
con_x = 1;
check = 1;
totms = 0;
traverse_node = [];

station_count = [];
station_data = [];
sel_nodes = [];
last_check_pnt = 1;
while(totms~=traves_MS)
    
    if s_min_x<=max_x&&check == 1
        check = 1;
    else
        check = 0;
        if s_min_x<=min_x && check == 0
            check = 1;
        end
    end
    if check ==1
        s_min_x = s_min_x+1;
        s_min_y = s_min_y+1;
    else
        s_min_x = s_min_x-1;
        s_min_y = s_min_y-1;
    end
    
    
    h1 = plot(s_min_x,s_min_y,s_min_x,s_min_y,'*','color','red');
    pnt1 = [s_min_x s_min_y] ;
    best_node_inx = best_dist(pnt1,nodes);
    best_x = nodes(best_node_inx).x;
    best_y = nodes(best_node_inx).y;
    best_pnt = [best_x best_y];
    hold on
    drawnow
    all_x = [pnt1(1) best_pnt(1)];
    all_y = [pnt1(2) best_pnt(2)];
    h2 = plot(all_x,all_y);
    pause(0.1);
    delete(h1);
    delete(h2);
end

Output

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