Costuming is another major aspect of Greek theatre. The costumes that they used were usually quite dull, however the masks were very dramatic and over the top, so that the audience that were far away could still get an idea of what was happening. Masks are still used today in some modern dramas. For example some horror films such as saw, Friday the 13th and scream all the main antagonists are wearing a scary mask of sorts.
As for the actual structure of the play usually the performance would begin with one or two of the characters the chorus then would enter singing and dancing, then there would be dialogue. This would usually just continue alternating until the end of the play, the chorus exits singing a processional song which usually offers words of wisdom related to the actions and outcome of the play.