Quote:

As I understood it, he wanted to return to the beginning of the line he is currently on.



Yes, this is what a carriage return does. Try the example script.

To move to the next line requires a newline Chr(10) as well.

Most console drivers unfortunately automatically convert Chr(10) -> Chr(10)+Chr(13). Happily, a carriage return on it's own is left unaltered and can be used to return you to the start of the line.

Here is a slightly more amusing example, an input field with a countdown timer. Note, AT() isn't used at all.
Code:
Break ON
 
$=SetOption("ASCII","ON")
 
$sTyped=""
$sCommand="halt"
$dCounter=10.0
$dInterval=0.1
$sColour="rrrryyyyggggggg"
 
$sText=Chr(13)+'Type "'+$sCommand+'" before the countdown expires! : '
While $sCommand AND $dCounter > 0
	If KBHit()
		Get $k
		If $k=Left($sCommand,1)
			$sTyped=$sTyped+$k
			$sCommand=SubStr($sCommand,2)
		EndIf
	EndIf
	Color w/n $sText
	Color n/g+ $sTyped
	Color r+/n $sCommand
	Color w/n " [ Time left: "
	$sNextColor=SubStr($sColour,1+CInt($dCounter),1)+"+/n"
	Color $sNextColor CInt($dCounter)
	Color w/n "] "
	Sleep $dInterval
	$dCounter=$dCounter-$dInterval
Loop
 
If $sCommand
	Color r+/n
	Chr(13)+"   KABOOM!     You were too late!                               " ?
Else
	Chr(13)+"   Phew, you made it with "+Cint($dCounter)+" seconds left!                       " ?
EndIf