Good afternoon, my problem is that I am using pic 16f877a, to program the software pic c and pickit2 to be able to record it, I can read it and record it correctly but at the moment of putting it to work it does not do anything !! The truth is that I do not know what it could be I would appreciate any contribution. I enclose the assembly used. 
The code I have is the following:
#include <16F877.h> //Archivo que incluye encabezados y definiciones
#use delay (clock = 4000000)
#FUSES NOWDT, XT
#use standard_io(b)
void main() {
while(1) {
output_low(PIN_B0);
delay_ms(100);
output_high(PIN_B0);
delay_ms(100);
}
}