This first lick uses notes only out of the C mixolydian scale.
It starts with a C7 arpeggio decending from the 3rd which moves into an Em7b5 arpeggio.
The C7 arp includes all the essential chord tone while the Em7b5 excludes the root and utilizes the 9th as well as the 3, 5 and 7.
There is a little bit of sweep/economy picking things happening here so pay close attention.