Overall Rating: 3.7 (of 5)
Here is a brief motive that works over Rhythm changes in Bb. It uses chord tones and half step approaches to create a jazzy sound without being to concerned with scale usage. (If you don't know what ryhtym changes are, or how to construct lines using chord tones and approach notes, see my other lessons on these subjects).
Notice that this line begins right on beat 1. The lines consists purely of 8th notes, so therefore we will end up with 8 notes per measure in four-four time. Notice the way this line "feels" as you listen to it, it has a different feeling then lines which start on other beats.