Watch some examples of PNF patterns
Leg pattern: Flexion / Adduction / External rotation with knee flexion
Arm pattern: Extension / Abduction / Internal rotation with elbow extension
Arm pattern: Extension / Adduction / Internal rotation
Arm pattern: Flexion / Abduction / External rotation
Arm pattern: Flexion / Adduction / External rotation
Leg pattern: Extension / Abduction / Internal rotation with knee extension
Leg pattern; Extension / Adduction / External rotation with knee extension
Leg pattern: Flexion / Abduction / Internal rotation with knee flexion
See the presentation of Fred Smedes about PNF Basic grips