if raddr >= 54 then		
	video_on <= '1';
	if (i < 5) then
		if (j < 4) then
			raddr <= raddr + 1;
			j:=j+1;
		else
			raddr <= raddr - 9;
			i:=i+1;
			j:= 0;
		end if;
	else
		i := 0;
	end if;
else
	raddr <= 74;
end if;