// we need to 'clear' our line so that we
// do not try to draw a line that does not exist!
{
drawLineInThisClip.clear();
}

{
//first: clear last rendering of line before redrawing
//If you didn't clear you would leave a trail of lines
drawLineInThisClip.clear();
//Set the lineStyle of our lines based on the variables we initialized
// at the top of our function
drawLineInThisClip.lineStyle(lineThickNess,lineRGB,lineAlpa, true ,'normal','round', 'miter');

// If the slope is Infinity or -Infinity, it's a vertical line
if(_slope == Infinity || _slope == -Infinity)

{

//Move the "pen" of our line ('moveTo') to the x value of 1
// point & a y value of '0' which is the top of the Stage

drawLineInThisClip.moveTo(myClip1._x, 0);

//Draw the line to ('lineTo') the same x value of our point
// point and a y value of Stage.height which is the
//the very bottom of theStage
// Using myClip1 was arbitrary. Both clips have the same x.

drawLineInThisClip.lineTo(myClip1._x,Stage.height);
}