So I'm trying to come up with a bassline for this song the guitarist of the band I'm in gave me and I feel like it should have a more melodic bassline but the progression is B C and then switches up to G F#. The only melodic technique I know is passing and leading tones but I can't really do that here can I? If I make use of more strings I could get from G to F and make it sound alright but, there's nothing in between B and C so I feel like I'm stuck doing the roots which I don't think sounds good in this situation. I was doing 2-2-2-4-5-6-3-3-3-5-6-7 on A and then the same thing on E when it switches. That's the best I've come up with using a leading tones type of thing but it doesn't really lead into the other chord. I feel terribly nooby but I really am just drawing a blank. My mind is kinda mushy right now. Any suggestions or tips? Or is that line actually alright? I mean it sounds alright I'm just worried it's not like, proper. Or something.