If you want standard height for the scallop, you can measure the top most strip to a length to more than 1 inch eg. 1.2' and push the top strip forward with your forefinger to meet the 1' mark of the bottom strip, then pull the other strips one by one to different lengths. ( the difference between the top and bottom lengths will be the height of your scallop).
Glue all the strips at one point. Use a thin wet brush to apply the glue. Dilute the glue slightly and apply with the very tip of the brush the glue it.
If you want to curve the edging more, remember that the height of the scallop needs to be more to give allowance for the curvature. Try to understand the physics behind what you are doing and it will be easy as pie!!
Use the natural curve you created at the start and do not pull the last strip too taut if you want a curled edging.
If you want to straighten the edging then you can make it with the last strip pulled taut or you can take the curled scallop and fold it to a valley fold at each point where all the strips are pasted .
If instructions look a bit confusing just look at the pics and you can figure it out.
Now starting at one mountain fold, put the strip on your forefinger as shown, roll the brush handle hard against your finger upto the adjacent mountain fold.
This will curve into a scallop.
Repeat the procedure from each fold to the next fold and you have your scalloped strip.