start by assigning your fingers to the third, fourth, fifth and sixth frets
on the fourth string play a G flat on the fourth fret using your second finger and an A flat on the sixth fret using your fourth finger
on the third string play a B flat on the third fret using your first finger and a D flat on the sixth fret using your fourth finger
shift your hand up one fret and on the second string play an E flat on the fourth fret using your first finger and a G flat on the seventh fret using your fourth finger