Answer:
(Act 1) Macbeth and Banquo run over the three witches in the heath near the battle zone. The witches uncover to Macbeth that he is to be the Thane of Cawdor, and in the end ruler. Macbeth doesn't confide in them. Regardless, by then the Thane of Ross appears and uncovers to Macbeth that he is indeed the Thane of Cawdor.
(Act 2) opens with Banquo and his youngster, Fleance, progressing toward bed in Macbeth's château. Macbeth ascends out of the fogginess, and addresses Banquo. Close to the completion of this scene, Macbeth hears a ringing of a ringer, which is Lady Macbeth's sign that they should start their murder plans. ...
(Act 3) The executioners butcher Banquo, who kicks the bucket asking his child to escape and to fight back for his passing. One of the executioners extinguishes the light, and in the murkiness Fleance move away. The executioners leave with Banquo's body to find Macbeth and notice to him what has happened.
(i was sick the day i learned abt this so it may not be correct, hope it helps tho :D)