Borders are one of the player's tools to minimize the chances of losing the yellow ball. They are also a source of points for the player's score. Borders are activated in pairs at the bottom left and right of the screen. When you activate a pair of borders for the first time you get a bonus of 400 points. A second pair of borders gives 800 points and the 3rd and final pair gives 1600 points and you can't go beyond that (otherwise it would be too easy ;-) ). Some bricks give negative bonuses removing pairs of borders from you, be careful not to catch them. If you have ever raised 3 pairs of borders and consequently had the bonus of 1600 points but you are reduced to 2 pairs by a negative bonus you can still raise a 3 pair with the appropriate bonus, but in this case you will only win 400 points (the 800 and 1600 points are only valid once).