Step 1: Fingernails
Sorry, ladies: those elegant left hand nails will have to go.
Step 2: Fingers on Tips Please
The fingers of the left hand should stand on their tips (that is why the nails must be short).
Step 3: Thumb and First Finger Work Together
The thumb and first finger should work together as a unit (except when changing position, which comes later). For now, wherever they go, the finger and thumb move together as a unit.
Step 4: Small Gaps and Big Gaps
A crucial technique is the ability to put the second finger in either a backward and forward position.
Here is a small gap between first and second fingers (2nd finger close to first finger).
Step 5: Big Gap
Here is a big gap (2nd finger close to THIRD finger).
Step 6: NO MIDDLE-SIZED GAPS!
So the first finger and thumb travel together, while the second finger can either be a small gap or a big gap away from the first.
There are NO MIDDLE-SIZED GAPS!
Then the third finger goes down after the second.
Step 7: Fourth Finger
The fourth finger goes down after the third. Try to keep it on its tip as far as possible.