OK, if this is the sort of thing:
Draw a white (or whatever) line from corner to corner with a pencil.
Click - hold the shift key down - click the other corner.Repeat for the other diagonal.
Write your text in black on another layer.
Rasterise the text layer.
Select the text colour (deselect contiguous) and stroke it with 1 px white.
Lower the opacity to c60%.
Flatten image & save.
Obviously you change any parameter to get what you want.