I would like to know how to do the line effect wich the lines are invisble but with the pic ...

You mean scan lines?

I would like to know how to do the line effect wich the lines are invisble but with the pic ...

Your question is not clear....

Lines can be made invisible with photoshop layer techniques.

Black and white bitmap artworks consiting of only black lines. You can make .bmp art works/images to bitmap mode. To do this;
(1) Open your image file with .bmp extension in photoshop.
(2) Change its mode to bitmap. (image>mode)
(3) Select all the content of bitmap(Ctrl+A). Copy its content and open a new document with RGB mode, 72 resolution.
(4) Paste the content on new document.
(5) Select magicwand tool in tool box.
(6) Click with magicwand tool exactly on any black line in the image. All lines connected with clicked line will be automatically selected. To select left over lines right mouse click and select the option similiar. All left over similar black lines will be selected so as to select complete line.
(7) Copy all the selected lines (Ctrl+C).
(8) Open a new layer in layers pllette.
(9) Paste copied lines from your clipboard (Ctrl+V) on the new layer. This new layer now contains only lines without background. Name this layer as "Lines".
(10) To fill colors; earmark the areas in "lines" llayer to be filled with colors. Enclose them ie those earmarked areas lines are to be connected with each other so as to make loop.
(11) Select again magicwand tool. Clcik inside looped areas with magicwand tool. Only those full areas making loop will be selected. Other areas remains as is.
(12) With area selected, open new layer. Now the selection will appear on new layer.
(13) Select your desire color in color mixer.
(14) Simply press Alt+backspace to fill color in the selection. The foreground color will be filled in to the selection.
(15) Again come back to "lines" layer. This time select another looped area.Repaeat Sl.No. 11 to 14 to complete filling of other looped areas.
(16) When done simply click on "eye" icon against "lines" layer in layer pallette. Your black lines will be invisible.
(17) Do not delete lines layer. You may require it for future corrections.

If this is not what you are looking for no problem some newbies may benifit from this.
Regards
Ramakrishna

If you mean scanlines try this tutorial:

http://night-star.net/tutorials/index.php?scanlines