./prog [<mode> <options>] mode: 0 is default 0: rainbow 1: red 2: green 3: blue 4: off 5: white 6: whole string with <options> color
./prog [<mode> <options>] mode: 0 is default 0: rainbow 1: red 2: green 3: blue 4: off 5: white 6: whole string with <options> color