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If you mean something like this :

This is how I did it.

1) CTRL+A (select all)

2) CTRL+C (copy)

3) go the the channels pallette and create a new channel. CTRL+V (paste)

4) Filter>>Stylize>>Find Edges

5) Back to the layers pallette and create a new layer. (turn off the original layers visibility)  CTRL+ALT+4 (loads Channel 4 as a selection). CTRL+ALT+I (to Inverse the selection) and fill with 5b79a1. DESELECT.

6) Create a new layer, drag it under the lines layer. Make your foreground color a light blue, and background a darker blue. Go Filter>>Render>>clouds. Go Filter>>Blur>>Motion Blur and make th direction vertical, amount 90 (or so)

7) Create a new layer at the bottom (above the background) and fill with white.

Then you may want to run the unsharp mask on the lines layer, or make a copy and play with layer modes.

Hope that helps.

:::BEGIN EDIT:::

Mark added the "Deselect" part to step 5.

:::END EDIT:::