hoehe = 100;
breite = 200;
pixelbreite = 3;

A = zeros(hoehe,breite);

for i = 1:breite
     if (mod(i,2) == 1)
         A(1:hoehe,i) = 1;
       
     else 
         A(1:hoehe,i) = 0;
     end
 end

imshow(A);