If the program is ended in direct mode, SmileBASIC will print "[filename] OK". If you don't want to make that print, you can add FADE RGB(255,0,0,0),1 in the second line. You'd better add ACLS in the top too. ACLS completely clears the screen, and FADE (255,0,0,0),1 will cover the whole screen whith black in one frame(1/60 seconds). I don't reccomend you to do the FADE, though.