if ((pixel_row >= 610) and (pixel_row <= 615)) then
Wall_show <= '1';

elsif ((pixel_row <= 30) and (pixel_row >= 25)) then
Wall_show <= '1';

elsif ((pixel_column <= 455) and (pixel_column >= 450)) then
Wall_show <= '1';

elsif ((pixel_column <= 30) and (pixel_column >= 25)) then
Wall_show <= '1';

else
Wall_show <= '0';

end if;