plz , little help , on small project

okay ,, mabey i need to insert the rotate instruction .. RR = rotate right
RF = rotate left
but i dont know where , so can u help me

in your code..you are directly moving data to ports..
without rotating it.. so before moving the data you should rotate it.. like this...

keep_rotating:
mov A,#55H ;move 0x55 to A
rr A  ;rotate right A
mov P1, A
sjmp keep_rotating

The above code you can take as a sample for you..

THANKS FOR RESPONDING . i rewrite it ..t can u tell me is it right ,,

MAIN: SETB P2.7 ;make P2.7 as input
MOV P1,#0FFH ;Switch off LED
JB P2.7,DOWN ;jump if 1
MOV A ,#055H
RR A
MOV P1,A
ACALL DELAY
MOV A ,0AAH
RR A
MOV P1,A
ACALL DELAY
MOV A,#55H
RR A
MOV P1,A
ACALL DELAY
MOV A ,0AAH
RR A
MOV P1,A
JNB P2.7,$ ;wait until it goes 1
DOWN:
 MOV A,#55H
RR A
MOV P1,A
ACALL DELAY
MOV A ,0AAH
RR A
MOV P1,A
ACALL DELAY
MOV A,#55H
RR A
MOV P1,A
ACALL DELAY
MOV A ,0AAH
RR A
MOV P1,A
JB P2.7,$ ;wait until it goes 0
AJMP MAIN
 
delay:
        mov r7, #7H
wait2:
        mov r6, #0FFH
wait1:
        mov r5, #0FFH
wait:
        djnz r5, wait
        djnz r6, wait1
        djnz r5, wait2
        ret

well its correct.. but..
the shifting will be done only once.. after that you will see LED not moving..
if you want to make them moving then..

DOWN:
 MOV A,#55H
RR A
MOV P1,A
ACALL DELAY
MOV A ,0AAH
RR A
MOV P1,A
ACALL DELAY
MOV A,#55H
RR A
MOV P1,A
ACALL DELAY
MOV A ,0AAH
RR A
MOV P1,A
JB P2.7,DOWN ; we are jumping back again to give a moving LED look
AJMP UP ; jump back again..

Similarly at the start..

MAIN: SETB P2.7 ;make P2.7 as input
MOV P1,#0FFH ;Switch off LED
UP:
JB P2.7,DOWN ;jump if 1
MOV A ,#055H
RR A
MOV P1,A
ACALL DELAY
MOV A ,0AAH
RR A
MOV P1,A
ACALL DELAY
MOV A,#55H
RR A
MOV P1,A
ACALL DELAY
MOV A ,0AAH
RR A
MOV P1,A
JNB P2.7,UP

One thing is.. you are using RR in both cases.. so you hardly feel any difference when you press the key.. so use RR in one case and RL in other.. if you want.. so when you press button, you will see the direction of LED moving changes.

okay thanks man ,, ya i have noticed that .. ... so the overall program will look like this right

MAIN: SETB P2.7 ;make P2.7 as input
MOV P1,#0FFH ;Switch off LED
UP:
JB P2.7,DOWN ;jump if 1
MOV A ,#055H
RR A
MOV P1,A
ACALL DELAY
MOV A ,0AAH
RR A
MOV P1,A
ACALL DELAY
MOV A,#55H
RR A
MOV P1,A
ACALL DELAY
MOV A ,0AAH
RR A
MOV P1,A
JNB P2.7,UP
DOWN:
 MOV A,#55H
RL A
MOV P1,A
ACALL DELAY
MOV A ,0AAH
RL A
MOV P1,A
ACALL DELAY
MOV A,#55H
RL A
MOV P1,A
ACALL DELAY
MOV A ,0AAH
RL A
MOV P1,A
JB P2.7,DOWN ; we are jumping back again to give a moving LED look
AJMP UP ; jump back again..

delay:
        mov r7, #7H
wait2:
        mov r6, #0FFH
wait1:
        mov r5, #0FFH
wait:
        djnz r5, wait
        djnz r6, wait1
        djnz r5, wait2
        ret

CAN U PLZ ANSWER ME IS RIGHT NOW OR NOT . CUZ I NEED TO GIVE IT TO THE DOCTOR TOMOROW ...

looks good to me.. rest you need to test on board

okay thanks .. man .i will test it ..