Blink LED on GP2 (PIC12F510)

//-------------------------------
// Program  :Blink LED on GP2
// Author   :Somlak Mangnimit
// Date     :19/03/2012
// Device   :PIC12F510
//-------------------------------
#include    <htc.h>
#define     _XTAL_FREQ  8000000
__CONFIG(OSC_IntRC&WDT_OFF&MCLRE_OFF&IOSCFS_ON);

//--- Main ---
void main(void){
CM1CON0 = 0x00;
ADCON0 = 0x00;
TRIS = 0x00;
OPTION = 0xc0;
    //--- Super loop ---
    while(1){
        GPIObits.GP2 = 1;
        __delay_ms(200);
        GPIObits.GP2 = 0;
        __delay_ms(200);
    }
}