Scroll text left to right and back
Use this filter expression:

"drawtext=enable='between(t,2.5,6.5)':fontsize=50:fontcolor=Green:fontfile='ariblk.ttf': \
text='textline1':x=min(4*(tw\+10)-(abs(4-2*(t-2.5)))*(tw+10)-tw\,10):y=h-th-130"


The above is for the first line. I've changed the values/expression for the enable and xparameters. The movement starts at 2.5 seconds, settles at 3s, stays till 6s and then disappears by 6.5