8051 microcontroller programming: Interfacing with push button and displaying the number of button presses

This is a good practice question.
PROGRAM:

  ORG 00H
  MOV 30H,#0C0H  
  MOV 31H,#0F9H
  MOV 32H,#0A4H
  MOV 33H,#0B0H
  MOV 34H,#99H
  MOV 35H,#92H
  MOV 36H,#82H
  MOV 37H,#0F8H
  MOV 38H,#80H
  MOV 39H,#90H
  MOV 3AH,#088H
  MOV 3BH,#83H
  MOV 3CH,#0C6H
  MOV 3DH,#0A1H
  MOV 3EH,#86H
  MOV 3FH,#8EH
  MOV R0,#30H
  SETB P1.0
  MOV P2,@R0
HERE: JB P1.0,HERE
HERE1: JNB P1.0,HERE1
  INC R0
  MOV A,@R0
  MOV P2,A
  SJMP HERE
  END