LCD Keypad 1602 and Arduino backlight bright control using up/down keys

lcd_arduino.ino

#include <LiquidCrystal.h>
//LCD pin to Arduino
const int pin_RS = 8; 
const int pin_EN = 9; 
const int pin_d4 = 4; 
const int pin_d5 = 5; 
const int pin_d6 = 6; 
const int pin_d7 = 7; 
const int pin_BL = 10; 

LiquidCrystal lcd( pin_RS,  pin_EN,  pin_d4,  pin_d5,  pin_d6,  pin_d7);
int global_bright = 120;

void setup() {
 lcd.begin(16, 2);
 lcd.setCursor(0,0);
 lcd.print("Leronet");
 lcd.setCursor(0,1);
 lcd.print("Press Key:<>");
 global_bright = 120;
}

void loop() {
 int x;
 x = analogRead (0);
 lcd.setCursor(10,1);
 if (x < 60) {
   lcd.print ("Right ");
 }
 else if (x < 200) {
   lcd.print ("Up    ");
   global_bright+=10;
 }
 else if (x < 400){
   lcd.print ("Down  ");
   global_bright-=10;

 }
 else if (x < 600){
   lcd.print ("Left  ");
 }
 else if (x < 800){
   lcd.print ("Select");
 }
 analogWrite(pin_BL, global_bright);
 lcd.setCursor(10,0);
 if (global_bright < 0) global_bright = 10;
 if (global_bright > 240) global_bright = 240;

 lcd.print(global_bright);
 delay(10);
}