Use Alternate Picking, Back and Forth, Down-Stroke, Up-Stroke
Try playing this next melody based on the C Major Scale.
It is similar to the song "Lean on Me" by Bill Withers.
1st Fret - 1st Finger
2nd Fret - 2nd Finger
3rd Fret - 3rd Finger
4th Fret - 4th Finger