Demo 0. This is based on my blog entry.
The TBC code is as follows.
loop(
await( click( b0 ) > out("0") ) >
await(
click( b1a ) > out("1A")
,
click( b1b ) > out("1B")
) >
await( click( b2 ) > out("2" )
)
The haxe code is here.