SET PAGESIZE 0
SET FEEDBACK OFF
DEFINE width=20
WITH
  lines AS ( 
    SELECT ROWNUM rn FROM DUAL CONNECT BY LEVEL < &width+16
  )
SELECT DECODE(
         SIGN(ROWNUM-&width-5),
              -1, LPAD(RPAD('*',3-2*ABS(3-ROWNUM),'*'),
                       &width+5-ABS(3-ROWNUM))||
                  LPAD(' ',&width-ROWNUM+8)||RPAD('*',2*(ROWNUM-4),' *')||
                  LPAD(RPAD('*',3-2*ABS(6-ROWNUM),'*'),
                       &width-ROWNUM-ABS(6-ROWNUM))||
                  LPAD('*',
                       DECODE(SIGN(ROWNUM-3*&width/4+3),-1,0,3*&width/4-ROWNUM)),
       DECODE(
         SIGN(ROWNUM-&width-11),
              -1, LPAD('***', &width+5),
       DECODE(
         SIGN(ROWNUM-&width-12),
              0, TRANSLATE(LPAD('BBB@?;5-24@µ;-*@BBB',&width+13,'@'),
                   '@Qé"(-è_çà)=*<,;:!1ôï23ö45îë67ê890°+?./§µù%#[|\]}{€¤AB',
                   ' abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ*'),
       DECODE(
         SIGN(ROWNUM-&width-14),
              0, TRANSLATE(LPAD('§à"ç-*',2*&width+3,'@'),
                   '@Qé"(-è_çà)=*<,;:!1ôï23ö45îë67ê890°+?./§µù%#[|\]}{€¤AB',
                   ' abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ*')
             )))) l
FROM lines
/