Rhombus Design

*
***
*****
***
*
SET serveroutput ON;

DECLARE
i NUMBER := 6;
j NUMBER := 0;
BEGIN
i := 2;
j := 2;

LOOP
DBMS_OUTPUT.put_line (LPAD (LPAD (' ', i, '*'), i + j, ' '));
i := i + 2;
j := j - 1;
EXIT WHEN i >= 6;
END LOOP;

i := 6;
j := 0;

LOOP
DBMS_OUTPUT.put_line (LPAD (LPAD (' ', i, '*'), i + j, ' '));
i := i - 2;
j := j + 1;
EXIT WHEN i <= 1;
END LOOP;
END;
/

*****
***
*
***
*****
SET serveroutput ON;

DECLARE
i NUMBER := 6;
j NUMBER := 0;
BEGIN
i := 6;
j := 0;

LOOP
DBMS_OUTPUT.put_line (LPAD (LPAD (' ', i, '*'), i + j, ' '));
i := i - 2;
j := j + 1;
EXIT WHEN i <= 1;
END LOOP;

i := 4;
j := 1;

LOOP
DBMS_OUTPUT.put_line (LPAD (LPAD (' ', i, '*'), i + j, ' '));
i := i + 2;
j := j - 1;
EXIT WHEN i >= 7;
END LOOP;
END;
/