Act 1 scene 1

Shakespeare sets the play for the Macbeth by incorporating witches in the first scene. The mood is scary and evil.

The line "fair is foul and foul is fair" means depending on the perspectives everything is not always what it seems.

Act 1 scene 1 if you wanted to suggest was an eerie, forbidding mood, you should use dark or very few lights. The sound effects would sound dark and scary.