PL/SQL :: Cursor In Another Cursor

i have a program like this

DECLARE
V_VARIABLE1 VARCHAR2(10);

CURSOR_ABC IS select...............;
BEGIN
OPEN CURSOR_ABC;
LOOP
FETCH CURSOR_ABC INTO V_VARIABLE1;
EXIT WHEN CURSOR_ABC%NOTFOUND;

WHAT IF I WANT TO INSERT ANOTHER SAME KINDA CURSOR LOOP HERE LIKE*

CURSOR_XYZ IS select...............;
BEGIN
OPEN CURSOR_XYZ;
LOOP
FETCH CURSOR_XYZ INTO V_VARIABLE2;
EXIT WHEN CURSOR_XYZ%NOTFOUND;
END LOOP;
CLOSE CURSOR_XYZ;
END LOOP;
CLOSE CURSOR_ABC;