to liudr: I removed and a I get five errors:
Error 1 undefined reference to LiquidCrystal::clear()' Error 2 undefined reference to LiquidCrystal::begin(unsigned char, unsigned char, unsigned char)'
Error 3 undefined reference to LiquidCrystal::setCursor(unsigned char, unsigned char)' Error 4 undefined reference to LiquidCrystal::setCursor(unsigned char, unsigned char)'
Error 5 undefined reference to `LiquidCrystal::LiquidCrystal(unsigned char, unsigned char, unsigned char, unsigned char, unsigned char, unsigned char, unsigned char)'
any help?