Just finish the 5 pentatonic boxes by Christopher Schlegel, I wasn't confused about it because of previous knowledge from various authors of this topic. So we simply add the notes within the box to get the specific mode of the scale. For a dorian mode, a B flat major scale is used in parallel mode. Using the B note of the C major scale and flatten it to get a Bb major scale. We start with the C note for a dorian C scale. As in the case of the A minor pentatonic we use the G scale and start with the A note for a dorian scale. If this is all wrong please correct me on this. Also pattern 1 is the G shape, 2 E shape, 3 D shape , 4 C shape, 5 A shape.