Playing Digital Patterns around the Circle of 5ths is good practice. It teaches you to think and move quickly from one key to the next. These patterns also come in handy in improvisation over short segments with two or more chords in a bar (such as turnarounds). Many great Jazz musicians use them that way.
The numbers of each pattern refer to the note number in each scale. Pattern 1 2 1 consist of the tonic and second note of the major scale in each of the 12 keys around the Circle.
Bb instruments start in the key of D, Eb instruments start in the key of A.
Keyboard players play root tones in the left hand and the digital pattern in the right.
Keep the right hand fingering the same over each pattern. In this case combine two patterns within one hand using fingers 1 2 1 (over C D C) and 4 5 4 (over F G F). Then shift the same fingering down to the keys of Bb and Eb.