function color = setcolor(value)
% the function color = setcolor(value)
if value == 1
  color = 'w' ;
elseif value == 2
  color = 'y';
elseif value == 3
  color = 'm';
elseif value == 4
  color = 'r';
elseif value == 5
  color = 'g';
elseif value == 6
  color = 'b';
elseif value == 7
  color = 'k';
end
