What exactly do you mean with "move"? If you want to change position in runtime, then it might be useful to make an actor with the image and move the actor around.
The parameters of the method are X1, Y1, X2, Y2, so it connects the points (X1|Y1) and (X2|Y2). X is the horizontal axis and Y the vertical.
move the vertical line to the right as with the images but I can not do it
You need to find a way to return the current line's pixels back to their original color and then draw the new line. The operation would require two drawLine commands (along with two setColor commands) OR one drawImage command (using an image that will cover both lines and adjust those pixels accordingly).