Simple lcd project

1#include <LiquidCrystal.h> 
2LiquidCrystal lcd(12, 11, 5, 4, 3, 2);  
3#define contra 9 
4#define bri 10 
5void setup() {
6  lcd.begin(16, 2);  
7  pinMode(contra, OUTPUT); 
8  pinMode(bri, OUTPUT); 
9  digitalWrite(contra,  LOW); 
10  analogWrite(bri, 255); 
11}
12void loop() {
13  lcd.print("LEWIS");  
14  lcd.setCursor(0, 1);
15  lcd.print("HAMILTONN!!");
16  delay(1000); 
17  for (int l = 0; l < 16; l++) { 
18    lcd.scrollDisplayRight(); 
19    delay(90);  
20  }
21  delay(1000);
22  for (int l = 0; l < 16; l++)
23    lcd.scrollDisplayLeft();
24  for (int l = 51; l > -1; l--) { 
25    analogWrite(bri, l * 5);
26    delay(35);
27  }
28  delay(1000);
29  digitalWrite(bri, HIGH);
30  for (int l = 0; l < 51;  l++) { 
31    analogWrite(contra, l * 5);
32    delay(35);
33  }
34  delay(1000);
35  digitalWrite(contra,LOW);
36  lcd.setCursor(0, 0);
37}