Create matrix of rectangular ones

I wrote a script that creates a 248x286 matrix of zeros with rectangular verticle bars of varying widths and element values 255. I would like to make 9 rectangular bars in the north, south, east, west and center locations. The script works for one set of bars but it is not well-written. I would appreciate help to optimize my program below. Thank you.

A = zeros(248,286); %create matrix of zeros
A(20:60,124:134) = 1 %north: rectangles 40 pixels long and 10 pixels wide
A(20:60,144:154)  = 1
A(20:60,164:174)  = 1

A(70:120,124:130) = 1 %north: rectangles 40 pixels long and 6 pixels wide
A(70:120,140:146)  = 1
A(70:120,156:160)  = 1

A(130:170,124:126) = 1 %north: rectangles 40 pixels long and 2 pixels wide
A(130:170,136:138)  = 1
A(130:170,148:150)  = 1

m = A*255;
imshow(m)
imwrite(m, 'Verticle_bars.bmp')

[Stephen23]

Duplicate:

https://www.mathworks.com/matlabcentral/answers/869473-make-elements-of-matrix-ones