I want Lazar. not bullet (addChild) and scale?

I have, aa program right now, a prototype if you will, that i’m really building my game around.

I have a Lazar class, attatched to a small red line movieclip

when you hit space bar it rapid fire those lines like this

)- - - - - - - - - - - - - - -

but i want a lazar,

)----------------------->

what i want, and what you all can help me with

some sort of sample code, even psuedo code

that would allow me to make it so that:

A) the lazar is one straigt line, not a whole bunch of little lines

…so the solid ______________ and not - - - - - - - -

b) scale of lazar only as big as hit test with wall or edge of stage

)------------->} the ) is where the lazar originates, the >} is a movieclip that represents the lazar hitting a wall

c) if you want to see the code let me know, but i’m really looking for more of a push in the right direction than an answer but either is great.