I couldn’t do my job without tweening classes like the amazing TweenMax. But who sais you have to tween the properties of a display object? Why not tween the properties of “just an object” and then use the drawing api to connect all the dots? Just like those “draw me by following the numbers” drawings you loved as a kid 
In this case, I’m using the stunning bezierTrough feature of TweenMax to fluidly draw the line.
Continue reading for source code (ofcourse you’ll be needing the TweenMax classes):