@0

// "Hello, world!\n"
48 65 6c 6c 6f 2c 20 77 6f 72 6c 64 21 0a

// "I will now echo your input: "
49 20 77 69 6c 6c 20 6e 6f 77 20 65 63 68 6f 20
79 6f 75 72 20 69 6e 70 75 74 3a 20

// At this point, will switch to ECHO mode until it reads a newline.
00

// "The Fibonacci sequence: "
54 68 65 20 46 69 62 6f 6e 61 63 63 69 20 73 65
71 75 65 6e 63 65 3a 20

// At this point, will switch to FIB mode until end of time.
00