2 LED on off program for microcontroller

This program is basically made for 2 LED but you can on-off a no. of LED like LED marque .  

org 0000h mov a,#010h again: mov p0,a cpl a mov p1,a acall delay cpl a mov p0,a cpl a mov p1,a sjmp again delay: mov r0,#0ffh loop1: mov r1,#0ffh loop: djnz r1,loop djnz r0,loop1 ret end

If you have and problem regarding this program then you can ask me. I made this project during my study time.