If the writer of the Tweet had had more space, they would doubtless have mentioned that the papyrus pictured is one of the earliest surviving musical texts and preserves the most substantial fragment of music composed for an extant tragedy. This is what it looks like if you transcribe it and here is a translation of the Greek.
The Greek letters above the lines of verse are the remains of the musical notation. There is a large bibliography connected with the papyrus. It was discovered sometime ago in 1892, but if you want to read about it, this is one place to start and if you want to listen to what it might have sounded like, this is onepossibility
Greek text on papyrus written ca.200 BC in Hermopolis,Egypt, has 7 lines 338-344 from Euripides' Orestes 408 BC pic.twitter.com/roMsScWi97