take the pattern you're looking to put together and repeat it a number of times. it will let you repeat the pattern a few times over. The technique requires a bit of work to put together.
Scroll saw patterns are created by either free hand drawing, tracing or even using a scanner to duplicate pictures from magazines then transfer onto wax type paper
If you want to create scroll saw patters to print out, you can use software like Adobe Illistrator. You can sketch out what you would like to cut, and then print it out and use it as a guide.
To create your own scroll saw patterns you may need additional softwares used with photoshop. Such softwares may be available as well as for very low rates. Also readymade scroll saw patterns are available on internet.