First, decide how long your pattern will be. In this example I will use a pattern length of 3.

Start by creating a table with four columns, and as many rows as you want your pattern to last.

Time	Left Catch	Left Throw	Right Throw	Right Catch
1
2
3

Remember the following rules for synchronous Site Swap:

• All numbers are even
• Crossing throws have an "x"

Time	Left Catch	Left Throw	Right Throw	Right Catch
1		4x
2
3

Count forward half that number of places. If you fall off the bottom, come back on the top. That gives you the landing row. Put a start in the appropriate column. If your throw has an "X" then it's in the other hand, otherwise it's in the same hand. In this example it's crossed over.

Time	Left Catch	Left Throw	Right Throw	Right Catch
1		4x
2
3				*

Now put another throw. Remember that you must use even numbers.

Time	Left Catch	Left Throw	Right Throw	Right Catch
1		4x	2
2				*
3				*

And another one.

Time	Left Catch	Left Throw	Right Throw	Right Catch
1		4x	2
2	*	6		*
3				*

And another one.

Time	Left Catch	Left Throw	Right Throw	Right Catch
1		4x	2	*
2	*	6		*
3		2x		*

Now there are two place left to throw from. Both are in the right hand. There are two landing places. Both are in the left hand. Both remaining throws must be crossing throws.

Time	Left Catch	Left Throw	Right Throw	Right Catch
1		4x	2	*
2	*	6	8x	*
3	*	2x		*

Time	Left Catch	Left Throw	Right Throw	Right Catch
1	*	4x	2	*
2	*	6	8x	*
3	*	2x	2x	*

Here is the new pattern: (4x,2) (6,8x) (2x,2x)

Can you do that? I can't!

Quotation from Tim Berners-Lee