game

var SNAKE_WIDTH = 15;
var SNAKE_HEIGHT = 15;

// Constants to represent the directions
var EAST = 0;
var SOUTH = 1;
var WEST = 2;
var NORTH = 3;
var snake;
var direction;
var dx = 0;
var dy= 0;
var snakePartsPositionX = Randomizer.nextInt(getWidth() - 20);
var snakePartsPositionY = Randomizer.nextInt(getHeight() - 20);

var snakePart;
var snakeElement;


function start(){
    drawSnake();
    setTimer(movement,25);
    setTimer(snakeParts,25);
    keyDownMethod(changeDirection);
    
}

function drawSnake(){
    remove(snake);
    var SNAKE_COLOR = Randomizer.nextColor();
    
    SNAKE_WIDTH = SNAKE_WIDTH + 5;
    SNAKE_HEIGHT = SNAKE_HEIGHT + 5;
    snake = new Rectangle(SNAKE_HEIGHT,SNAKE_WIDTH);
    snake.setPosition((getWidth()/2)-20,(getHeight()/2)-20);
    snake.setColor(SNAKE_COLOR);
    add(snake);
}

function movement(){
    snake.move(dx,dy);
    if (direction == WEST){
        dx = -4;
        dy = 0;
    }
    
    if (direction == NORTH){
        dx = 0;
        dy = -4;
    }
    
    if (direction == SOUTH){
        dx = 0;
        dy = 4;
    }
    
    if (direction == EAST){
        dx = 4;
        dy = 0;
    }
 }
 
 function changeDirection(e){
    if (e.keyCode == Keyboard.LEFT){
        direction = WEST;
    }else if(e.keyCode == Keyboard.RIGHT){
        direction = EAST;
    }else if(e.keyCode == Keyboard.UP){
        direction = NORTH;
    }else if(e.keyCode == Keyboard.DOWN){
        direction = SOUTH;
    }
}

function snakeParts(){
    if(!snakePart){
        snakePartsPositionX = Randomizer.nextInt(getWidth() - 20);
        snakePartsPositionY = Randomizer.nextInt(getHeight() - 20);
        snakePart = new Circle(10);
        snakePart.setPosition(snakePartsPositionX,snakePartsPositionY);
        snakePart.setColor(Randomizer.nextColor());
        add(snakePart);
        
    }
        eatSnakeParts();
}

function eatSnakeParts(){
    snakeElement = getElementAt(snakePart.getX() - snakePart.getRadius() - 5, snakePart.getY());
    if(snakeElement){
       eatSnakePart();
       console.log(SNAKE_WIDTH);
       drawSnake();
    }
    
    snakeElement = getElementAt(snakePart.getX() + snakePart.getRadius() + 5, snakePart.getY());
    if(snakeElement){
        eatSnakePart();
        console.log(SNAKE_WIDTH);
        drawSnake();
    }
    
    snakeElement = getElementAt(snakePart.getX(), snakePart.getY() - snakePart.getRadius() - 5);
    if(snakeElement){
        eatSnakePart()
        console.log(SNAKE_WIDTH);
         drawSnake();
    }
    
    snakeElement = getElementAt(snakePart.getX(), snakePart.getY() + snakePart.getRadius() + 5);
    if(snakeElement){
        eatSnakePart();
        console.log(SNAKE_WIDTH);
        drawSnake();
    }
}

function eatSnakePart(){
     remove(snakePart);

     snakePart = null;
     
     setTimer(snakeParts,25);
}