function [x,y,s] = mask(a,idx,orient,vals)[xj,yj] = fm_draw('J','Jimma',orient);x = cell(2,1);y = cell(2,1);s = cell(2,1);x{1} = [-1 -1 1 1 -1];y{1} = [-1 1 1 -1 -1];s{1} = 'k';x{2} = xj;y{2} = yj;s{2} = 'b';