Second Sketch of String Quartet No.1 "2020"

Hello guys. Haven't been active in this forum for a long time. So this is my second draft of my first string quartet. So you're advices/critiques will help in my venture in writing the next parts of the piece (yes some parts are not good).Hope you like it.

https://flat.io/score/5e6f38d9b35b8f06521c6575-string-quartet-no-1-in-e-minor-2020

Have in mind that these two are not as close as it seems: 

That is, very unfortunately, nearly impossible. I tend not to ask string players to play notes that are a fifth from each other (not including open strings), especially not three at once. Have an mind that if you write this they'll probably play the first note for a brief of a second then play the ones that are a fourth apart.

You could get way more power if you set them all in octaves apart rather than at the same octave. The Vlc, at least, would sound way weaker than how it could have been, and the Vln seems to play at their sweeter, not as sharp nor extreme, range. Also the trill, begin with all of them synchronized because they're not a computer, would sound like a mess (it's ok if that's what you meant for).

I'm confused. Whats you thematic material?

I agree with everything this guy  advised. Think of them as different voices.

Impossible. When you write more than two notes on one string instrument- think of what note should be played on what string.

Thanx for the advice!!