The set:
The set as forest:
The witches appear on the tree branches:
Lady Macbeth enters:
Lady Macbeth invokes bloody spirits, as the witches supervise from the treetop:
The witches manipulate Macbeth into seeing a dagger before him:
Everything gets bloody:
The witches watch the ghost of Banquo leaving after the feast:
Macbeth sees an apparition: