can anyone tell me if any of my programming could be making my lcd go funny?

an anyone tell me if any of my programming could be making my lcd go funny? many thanks
-L

#include <LiquidCrystal.h>

LiquidCrystal lcd(1, 2, 4, 5, 6, 7);

void setup() {
lcd.begin (16,2);
}

void loop() {
lcd.print ("hello martian");
delay(3000);

lcd.setCursor(2,1);
lcd.print ("mac mk.1.0");
delay(3000);

lcd.clear();

}

What do you mean by "go funny" ? Have you checked your wiring ?

Pin 1 is the hardware serial TX pin. Recommend using a different pin for the LCD.