#include <xc.h>
 
// CONFIGURATION BITS (you can set via MPLAB config bits window too)
#pragma config OSC = HS       // High Speed Oscillator
#pragma config WDT = OFF      // Watchdog Timer Disabled
#pragma config LVP = OFF      // Low Voltage Programming Disabled
 
#define _XTAL_FREQ 20000000   // 20MHz external crystal
 
void main(void) {
    TRISBbits.TRISB0 = 0;  // Set RB0 as output
 
    while(1) {
        LATBbits.LATB0 = 1;  // Turn LED ON
        __delay_ms(1000);    // Wait 1 second
 
        LATBbits.LATB0 = 0;  // Turn LED OFF
        __delay_ms(1000);    // Wait 1 second
    }
}