Código COBOL:
WORKING-STORAGE SECTION.
SCREEN SECTION.
01 CLEAR-SCREEN.
05 BLANK SCREEN BACKGROUND-COLOR 0.
PROCEDURE DIVISION.
MAIN-PROCEDURE.
display CLEAR-SCREEN
DISPLAY "Hello world" at 0105
DISPLAY "Hello world2" at 0205
display CLEAR-SCREEN
DISPLAY "Hello world3" at 0305
DISPLAY "Hello world4" at 0405
STOP RUN.