"Example for program mode (console)"
"cat program: a program that repeats the input to the output."
"This example works in interactive mode too! But don't press the keys too fast."
"The output is then in the bottom left."

"we're always ready to receive input"
IO2

"when receiving input update, immediately send output update"
1I
O*

"quit on EOF"
0I
O*

"connect each input bit directly to output bit"
0o 1o 2o 3o 4o 5o 6o 7o
i* i* i* i* i* i* i* i* 






