To make the chord changes in the previous progression easier, play the Em chord with your first and second fingers. This will allow the use of pivot fingers between G to Em and Em to C. A pivot can also be used between C and D7 and a slide finger between G and D7. Alternative fingering for any chord shape can be used to make chord progressions easier to play.
In this turnaround there are two chords in each bar. Use your first and second fingers as pivots when changing between C and Am.
Notice the similarity in sound between the previous two Turnaround progressions. They are the same progression but in two different keys.
The delay pedal makes a copy of what a guitarist plays and repeats it at a specific rate depending on how the controls are set. You can control the speed of the delay and the number of repeats. Delays are used to great effect by Edge from U2, David Gilmour of Pink Floyd and Andy Summers of the Police.