[求助][求助]一个时间问题请高手教一下..j真的都没吗会吗

 一亮一暗会有空白期,我想要做这个时间..但暗的时慢慢暗下去,二个灯一亮一暗能接的上...请高手教一下吧

ORG 0000H     
 LJMP MAIN     
MAIN: 
   MOV P1 ,#10000000B    
 ACALL DELAY 
 MOV P1 ,#00000000B
 ACALL DELAY
        MOV P1 ,#01000000B
        ACALL DELAY
        MOV P1 ,#00000000B
        ACALL DELAY
        MOV P1 ,#00100000B
        ACALL DELAY
        MOV P1 ,#00000000B
        ACALL DELAY
 MOV P1 ,#11000000B
 ACALL DELAY
        MOV P1 ,#00000000B
        ACALL DELAY
        MOV P1 ,#01100000B
        ACALL DELAY
        MOV P1 ,#00000000B
        ACALL DELAY
        MOV P1 ,#10100000B
        ACALL DELAY
        MOV P1 ,#00000000B
        ACALL DELAY
 AJMP MAIN        

DELAY: MOV R5,#100    
F3: MOV R6,#200
F2: MOV R7,#200
F1: DJNZ R7,F1       
 DJNZ R6,F2
 DJNZ R5,F3
 RET
 END

谢谢你的回复...还是不太懂