Watch the Thanks for the Memory 4 online guitar lesson by Tierra Negra from New World Flamenco
To play the melody, begin by resting your thumb on the low E string to stabilize your hand. Play the melody with rest strokes using the index (I) and middle finger (M) of the left hand.
In other words, after plucking each string, rest the finger on the next string. If you pluck the high E with the index finger, for example, let the finger come to rest on the B string as it completes the stroke.