Redo the LED blink code, this time using for loops to generate the delays, instead of calling the delay function. How do I change the code to use for loops to create delays?

Code:
// CONFIG 

#pragma config FOSC = HS     // Oscillator Selection bits (RC oscillator) 

#pragma config WDTE = OFF       // Watchdog Timer (WDT enabled) 

#pragma config PWRTE = OFF      // Power-up Timer Enable bit (Power-up Timer is disabled) 

#pragma config CP = OFF         // Code Protection bit (Code protection disabled) 

 

#include < stdio.h > 

#include < xc.h > 

 

 

#define LED RA0 

#define _XTAL_FREQ 20000000 

void main() 

{ 

  TRISA = 0; 

 LED = 1; 

   while(1) 

{ 

   __delay_ms(500); 

  LED =0; 

   __delay_ms(500); 

   LED=1; 

   } 

}