Preparing the field
Create a new file (File | New) then from New Document window select Actionscript 3.0. Set its properties as width to
640 px, height to
480 px, background color to
#FFFFFF (white), and frame rate to
6. Also define the Document Class as
Main and save the file as
snake.fla. I want you to note the low frame rate, set to six. This is because we'll update snake position at every frame, without smooth animations, as it's not required in these kind of games. Anyway, you can make the game run at any number of frames per second, having a variable, with a counter, that runs the update function and resets itself at every n frames. We'll discuss this at the end of the chapter.