The next example uses quarter notes only throughout the entire progression. The notes move in a gradually ascending and descending fashion. This type of bass playing is often referred to as walking or swing bass. Another variation of an eight bar Blues progression is used.
This example uses a similar eight bar Blues progression to the previous example. This time the key of E is used with a few additional chords. Once again the walking bass is the feature.
For more Blues bass licks incorporating walking basslines see Progressive Blues Bass licks.
Now try applying a walking bass line to the previous chord progression. This line is more "busy". You can combine the types of basslines from both examples to create more variations. This is often necessary when the progression is repeated several times, helping to provide a more interesting bassline.