//draw background
g.setColor(Color.WHITE);
g.fillRect(0,0,canvasWidth,canvasHeight);
//draw the snake
g.setColor(Color.BLACK);
LinkedList na=snakeModel.nodeArray;
Iterator it=na.iterator();
while(it.hasNext())
{
Node n=(Node)it.next();
drawNode(g,n);
}
// draw the food
g.setColor(Color.RED);
Node n=snakeModel.food;
drawNode(g,n);
updateScore();
