fix of http://pastebin.com/86JXkUBf

// include the library code:
#include <LiquidCrystal.h>
  int byteincome = 0;
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
//Key message
int adc_key_val[5] = {
  30, 150, 360, 535, 760
};
String statuses[] = {
  "Coding", "Doing Homework", "Please Leave", "Away", "Sleeping", "Calling Home", "Gaming", "GET OUT"
};
String top[] = {
  "Status:", "Adam:", "Oliver:", "Adam & Oliver:", "Awesomeness", "OBEY:"
};
int NUM_KEYS = 5;
int adc_key_in;
int key = -1;
int oldkey = -1;
int mode = 0;
int blp = 10;
int i = 0;
int j = 0;

void setup() {
  // set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  lcd.setCursor(0, 1);
  intro();
  Serial.begin(9600);
  pinMode(10, OUTPUT);
  digitalWrite(blp, HIGH);
}

void loop() {
  // set the cursor to column 0, line 1
  // (note: line 1 is the second row, since counting begins with 0):

  adc_key_in = analogRead(0); // read the value from the sensor
  key = get_key(adc_key_in); // convert into key press
  if (key != oldkey) // if keypress is detected
  {
    delay(50); // wait for debounce time
    adc_key_in = analogRead(0); // read the value from the sensor
    key = get_key(adc_key_in); // convert into key press
    if (key != oldkey) {
      oldkey = key;
      if (key == 0) {
        j++;
        if (j > 5) {
          j = 0;
        }
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print(top[j]);
        lcd.setCursor(0, 1);
        lcd.print(statuses[i]);
      }
      if (key == 3) {
        j--;
        if (j < 0) {
          j = 5;
        }
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print(top[j]);
        lcd.setCursor(0, 1);
        lcd.print(statuses[i]);
      }
      if (key == 1) //down key
      {
        i--;
        if (i == -1) {
          i = 7;
        }
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print(top[j]);
        lcd.setCursor(0, 1);
        lcd.print(statuses[i]);
      }
      if (key == 2) //up key
      {
        i++;
        if (i > 7) {
          i = 0;
        }
        lcd.clear();
        lcd.setCursor(0, 0);
        lcd.print(top[j]);
        lcd.setCursor(0, 1);
        lcd.print(statuses[i]);
      } else if (key == 4) {
        if (mode == 0) {
          mode = 1;
          lcd.noDisplay();
          digitalWrite(10, LOW);
        } else if (mode == 1) {
          mode = 2;
          lcd.display();
          digitalWrite(10, LOW);
        } else if (mode == 2) {
          mode = 0;
          lcd.display();
          digitalWrite(10, HIGH);
        }
      }
    }
  }
}

// Convert ADC value to key number
int get_key(unsigned int input) {
  int k;
  for (k = 0; k < NUM_KEYS; k++) {
    if (input < adc_key_val[k]) {
      return k;
    }
  }
  if (k >= NUM_KEYS)
    k = -1; // No valid key pressed
  return k;

}
int intro() {
  lcd.setCursor(0, 0);
  lcd.print("Select: Mode");
  lcd.setCursor(0, 1);
  lcd.print("Left/Right: Top");
  delay(1500);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Left/Right: Top");
  lcd.setCursor(0, 1);
  lcd.print("Up/Down: Scroll");
  delay(1500);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Up/Down: Scroll");
  lcd.setCursor(0, 1);
  lcd.print("Status:");
  delay(1500);
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Status:");
  lcd.setCursor(0, 1);
  lcd.print("Coding");
  return 0;
}