Step 1: Maximum snake!

We need to define an array, but first, let's add a constant for the maximum number of snakes. This is important, because without it, it's chaos trying to remember how many are allowed throughout your program.

First, decide how long the snake can be. We need to know how big to make the arrays. 256 seems pretty big, but on a 128x64 screen, there are 8192 pixels!

Snake.spin

    RIGHT = 1
    DOWN  = 2
    LEFT  = 3

    MAX_LENGTH = 256

OBJ
    lcd  : "LameLCD"

We need to turn our snakex and snakey variables into arrays.

Snake.spin

    ctrl : "LameControl"

VAR
    byte    snakex[MAX_LENGTH]
    byte    snakey[MAX_LENGTH]

    byte    snakedir

We now need to update the syntax of every snakex and snakey. Find ([Ctrl+F]{.keycombo}) is the fastest way to make this happen.

Warning

Make sure you replace all instances of snakex with snakex[0] and snakey with snakey[0]. E.g.:

    snakex[0] := 32
    snakey[0] := 32

Don't accidentally replace your array declaration:

    byte    snakex[0][MAX_LENGTH]
    byte    snakey[0][MAX_LENGTH]