Oracle Flashback monitoring scripts

PROMPT How Far Back Can We Flashback To (Time)?
PROMPT
select to_char(oldest_flashback_time,'dd-mon-yyyy hh24:mi:ss') "Oldest Flashback Time"
 from v$flashback_database_log;

PROMPT
PROMPT How Far Back Can We Flashback To (SCN)?
PROMPT
col oldest_flashback_scn format 99999999999999999999999999
select oldest_flashback_scn from v$flashback_database_log;

PROMPT
PROMPT Flashback Area Usage
SELECT * FROM   V$FLASH_RECOVERY_AREA_USAGE;

PROMPT
col ROUND(SPACE_LIMIT/1048576) heading "Space Allocated (MB)" format 999999
col round(space_used/1048576) heading "Space Used (MB)" format 99999
col name Heading "Flashback Location" format a40

select name, round(space_limit/1048576),round(space_used/1048576)
 from  v$RECOVERY_FILE_DEST;