Hey

So I started to transcribe a song in midi. I've searched and no sheets are available for that music (it's kind of normal because it is not really a piano song).
So, this is the song https://www.youtube.com/watch?v=lwB3lOn69Uo (Own eyes music- Pale sunshine). I've already the sort of melody in the begin. I've searched and tried during hours to find the sort of arpegios the left hand is supposed to do at 15 seconds, but I really don't find it..

Could someone help me please?