The Heider-Simmel Illusion

(1) What kind of a person is the big triangle? (2) What kind of a person is the little triangle? (3) What kind of a person is the circle (disc) ? (4) Why did the two triangles fight? (5) Why did the circle go into the house? (6) In one part of the movie the big triangle and the circle were in the house together. What did the big triangle do then? Why? (7) What did the circle do when it was in the house with the big triangle? Why? (8) In one part of the movie the big triangle was shut up in the house and tried to get out. What did the little triangle and the circle do then ? (9) Why did the big triangle break the house? (10) Tell the story of the movie in a few sentences.