The document discusses the key elements of a basic game loop as applied to the game of Pong. The input is the arrow keys which update the movement of each paddle and the ball when pressed. The output displays each paddle moving according to the input and colliding with the ball, as well as the changing score as the ball passes paddles to score points.

1. DISPLAY
OUTPUT
UPDATE
INPUT
PROGRAM
GAME LOOP
GAME LOOP
When applying this to a game of PONG the Input becomes the arrow keys located on the keyboard which when
pressed Update the gameplay and movement of each paddle. This also affects the movement of the ball. which
means that the Output becomes the display of each paddle moving in the chosen direction and colliding with the
ball. Another element of Display is the score and this changes as the ball passes the paddle and the opposite
player scores a point.