ABAP : send TABLE to perform

REPORT ZPATMAX_ZARF01.
PERFORM start.
TYPES : BEGIN OF ty_data,
        no    TYPE i,
        END OF ty_data.
DATA : vvvvv    TYPE i VALUE 10,
       it_data  TYPE TABLE OF ty_data WITH HEADER LINE.
    it_data-no = 99.
    APPEND it_data.
    it_data-no = 100.
    APPEND it_data.

*PERFORM sleep ."TABLES it_data.
PERFORM start.

FORM start.
  DATA lt_student TYPE TABLE OF ty_data WITH HEADER LINE.
   lt_student-no = 100.
    APPEND lt_student.
   PERFORM sleep TABLES lt_student.
ENDFORM.
FORM sleep TABLES llt_student ." TABLES inbound .
      DATA h_student type ty_data.
    BREAK-POINT.
    h_student-no = 101.
    APPEND h_student TO llt_student.
ENDFORM.