Or see below for a few interesting modifications you can make:

Swap the Landings:

Click on two numbers to switch the positions in which their throws land:

Increment/Decrement:

Add or subtract '1' to each and every number in the pattern.
After the period has been reached it is substituted for the lowest possible number.
After '0' has been reached, it is substituted for one less than the period:

Breed Tricks:

Type a trick into the 'Mother' input field.
The Period must be the same for both the Father and Mother tricks.

Let Me Juggle That For You - v1.2

A Siteswap Checker and Generator