Please help for WS2812 IC LED

Hello,

I want to use Ws2812 ic led.
I don't use arduino, but can you help me?
I use a Microchip pic 16f88 clocked at 20Mhz
The code : (i wan't to blink led)

asm("nop") is equals at 50ns, no ?

#include <htc.h>
#define _XTAL_FREQ 20000000

void main() {
TRISB = 0;
PORTB = 0;
int i,j;

while(1) {

for (i=0;i<24;i++) {
PORTB = 255;
//350ns = 0.35us
asm("nop");asm("nop");asm("nop");
asm("nop");asm("nop");asm("nop");asm("nop");
PORTB = 0;
//0.8us
asm("nop");asm("nop");asm("nop");asm("nop");
asm("nop");asm("nop");asm("nop");asm("nop");
asm("nop");asm("nop");asm("nop");asm("nop");
asm("nop");asm("nop");asm("nop");asm("nop");
}

__delay_ms(1000);

for (i=0;i<24;i++) {
PORTB = 255;
//0.7us
asm("nop");asm("nop");asm("nop");asm("nop");
asm("nop");asm("nop");asm("nop");asm("nop");
asm("nop");asm("nop");asm("nop");asm("nop");
asm("nop");asm("nop");
PORTB = 0;
//0.6us
asm("nop");asm("nop");asm("nop");asm("nop");
asm("nop");asm("nop");asm("nop");asm("nop");
asm("nop");asm("nop");asm("nop");asm("nop");
}
__delay_ms(1000);
}
}



Thanks for your help
(I'm french, sorry for my english)