s-l-a-c-k-e-r.....thats what u are
went abit overboard w/the simplicity on this one....quicky scanline tut:
1) open new document, 15 x 15 pixels
2) use 1px pencil tool to draw line from bottom left corner to top right corner
3) edit--->define pattern
4) in you sig, fill bucket ---> change "foreground" to "pattern", fill, and viola! scanlines!