Gravity Falls Theme

This is my first tab, I'm not quite sure about the very last part. Feel free to message me if you have a better idea of how it should sound.
'
7 '-6 '5 '-6 ' ' 7 '-6 '5 '-6
7 '6 '5 '6 ' ' ' 7 '6 '5 '6
-7 '-6 '5 '6 ' ' -7 '-6 '5 '6
-7 '-6 '5 '6 ' ' -7 '-6 '5 '6
'
-4 '5 '-5 '-6 '6 '-6 '4
-4 '5 '-5 '5 '6 '-6 '6 '-5
'
-5 '-5 '-5 '-6 '-6 '6 '-5
-6 '-6 '-6 '6 '-6 '6 '-5
-5 '-5 '-5 '-6 '-6 '6 '-5
-6 '-6 '-6
7 '7 '7
-5 '-5 '-5 '-6 '-6 '6 '-5
-6 '-6 '-6 '-5 '-7 '6 '-7 '7