Below is a diminished arpeggio you can practice then incorporate it in your own playing. Note: You can play this same arpeggio (form) up three frets or down three frets since in theory there's only 4 diminished chords or scales. You will be playing the same notes but they will be inverted. Click on the file attachment below for a sound sample.
E||--6-----------------------|-----|
B||-----8--5-----------------|-----|
G||-----------6--------------|-----|
D||--------------8--5--------|-----|
A||--------------------7-----|-----|
E||-----------------------9--|--6--|