The following turnaround progression uses the chords, C, Am, Dm and G7.
Am
Dm
G7
A dotted line indicates that a string is not to be played. In the Dm chord only the first five strings are played.
Pattern One
Any progression with a repeat sign should be ended by a single strum of the opening chord, e.g., finish this progression by strumming a C chord.
Remember that the thumb plays a bass note, while the index and middle fingers play the second and first strings. Notice that the bass note in each case is also the root note* of the chord.