Pline macro

Hi,

Trying to create a macro to first set Plinewid to 5, then iniate pline command and let's you draw the polyline and ends with setting Plinewid to 0.

This is as far as I've gotten: ^C^CPLINEWID;5;^CPL;\

The problem is that the number of user inputs can differ depending on how you draw the line, I would like some way to make the userinput variable to repeat itself until you press enter and then do the string: PLINEWID;0;

Can this be archieved?