This scene is meant to depict when the soothsayer is trying to warn Caesar about the 15th of March. Cassius and Casca are seen in the background thinking about how they will assassinate Caesar. Julius is off looking in a different direction to show how oblivious he is to the soothsayer's warning.
Antony vs. Brutus
"Had you rather Caesar were living, and die slaves,than that Caesar were dead, to live all freeman?"
"I thrice presented him a kingly crown, which he did thrice refuse. Was this ambitious?"
This scene is meant to represent Brutus receiving the letter from "a towns person". The dark shadows that appear are meant to represent the conspiracy and how opening that letter has fully convinced Brutus to join the conspiracy to kill Caesar.
The ghost of Julius Caesar
The dark men in cloaks are meant to signify the men in the conspiracy and the two men stabbing Caesar are Brutus and Cassius. The dark sky shows a dark dramatic scene that develops a ominous and menacing tone.
The death of Brutus and Cassius
This scene shows the two speeches that were said during Caesar's funeral. The lines said by Brutus are meant to push the idea that Brutus truly killed Caesar to avoid a tyranny and believed he was saving Rome. The smaller crowd is meant to show that Antony had much more of influence over the people. Antony using irony and proving to the people that Caesar did not have bad intentions.
This scene is meant to show the differences between the deaths of Cassius and Brutus. Brutus takes his own life upon realizing that all the people surrounding him are cold and manupaltive. He wanted what was best for Rome and his intentions were never greedy unlike Cassius. Cassius kills himself out of grief and fear of loosing the fight. The two were so different, one was humble and the other selfish.