I need two motifs for two cats one is mischievous and the other is curious. I am doing a string quartet in G major the time signature is 4/4.Each motifs needs to start and end on G/B/D and be no longer than a bar long.Any suggestions please     

https://www.youtube.com/watch?v=AlCMl1GQ72AThis is my first attempt on string quartet! I will be glad if you can give me some feedback!

So I only have a few measures of a first movement but I hope to expand this into a full 4 movement string quartet. Thing is, I find it hard to get the combination of being in sonata form and still being interesting when it gets past duets into trios and quartets. I know it should be easier because I have more freedom with a string quartet than with a piano sonata but no, I have always found piano sonatas easier to compose.Here is my first draft. You can see that I go from a Tutti to the cello playing solo which really brings out the warm sound of the cello. I plan on having the other instruments come back one by one until I reach Tutti again. So here is the link:https://musescore.com/user/50070/scores/5453458