Here's a function that places an M x N grid of Xs within a rectangle defined by pos, as well as a few lines which use that function to create your frames.
M = 8; % "\" pattern and "/" pattern (column)
N = 8; %"\" pattern and "/" pattern (Row)
Mg = 2; % Frame size (column)
Ng = 2; % Frame size (Row)
ax = axes('NextPlot', 'add',...
'XTick', [],...
'YTick', []);
for ii = 1:Mg
for jj = 1:Ng
pos = [ii, jj, 1, 1];
fillSquareWithXs(ax, pos, M, N)
end
end
function fillSquareWithXs(ax, pos, M, N)
% ax - target axes
% pos - position of square, [llx, lly, width, height]
% M - # of rows of Xs
% N - # of cols of Xs
% find location, width, and height of each X
xco = linspace(pos(1), pos(1)+pos(3), M+1);
yco = linspace(pos(2), pos(2)+pos(4), N+1);
dx = diff(xco)/2;
dy = diff(yco)/2;
xco = xco(1:end-1) + dx;
yco = yco(1:end-1) + dy;
% plot Xs
for q = xco
for w = yco
plot(ax,q+[dx/2 -dx/2],w+[-dy/2 dy/2],'r') % "\" pattern
plot(ax,q+[dx/2 -dx/2],w+[dy/2 -dy/2],'b') % "/" pattern
end
end
% plot borders
plot([pos(1), pos(1)], [pos(2), pos(2)+pos(4)], 'k', 'LineWidth', 2);
plot([pos(1), pos(1)+pos(3)], [pos(2)+pos(4), pos(2)+pos(4)], 'k', 'LineWidth', 2);
plot([pos(1), pos(1)+pos(3)], [pos(2), pos(2)], 'k', 'LineWidth', 2);
plot([pos(1)+pos(3), pos(1)+pos(3)], [pos(2), pos(2)+pos(4)], 'k', 'LineWidth', 2);
end
