Blocks and return value

[Jerppu]

Hi. How could I get results of following loop to side block on my forum (php/html)

So output 5 times $description :

	$limit = 5;
	for($x=0;$x<$limit;$x++) {
		...random code...
		$description = $feed[$x]['desc'];
		...random code...
	}

Instruction says:
$my_output = 'Hello, world.';
return $my_output;

But if I add "return $description;", I get only one output cause "return" immediately ends execution of the code.