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what does this code do? trying to learn the basics

the_future

i think i have a good idea of what this code does i was thinking it was better to hear it from the experts

 

;assex2b.asm

     .AREA  CODE1 (ABS);

     .RADIX H;

     .ORG 1000;

      LD   SP,#1100;

      LD   A,#98;

     OUT   (03), A;

 

again:       IN A,(00);

                 AND   A,(00);

                 JP Z,again;

                 LD   A,#00;

LOOP:      OUT  (01),A;

                 CALL DELAY;

                 INC  A;

                JP LOOP;

DELAY:    PUSH AF;

                LD    D,#0FF;

DECR:     DEC D;

               JP    NZ,DECR;

               POP AF;

               RET;