is it possible to draw a line on a canvas using
then draw another one in the same way.
At this point i want to delete the first line, is this possible or would i have to clear the graphics layer and then redraw the second line?
Gotta clear everything and redraw. If you know some graphics are going
away, you put them in different display objects above or below other
graphics and remove them, but having too many display objects can be much
slower than re-running the graphics code after a clear().