-- ftd.color red: red
dark: red

-- ftd.color green: green
dark: green

-- foo:

-- ftd.column foo:
boolean open: true
$on-click$: toggle $open
padding: 50
background-color: $red
align: center
cursor: pointer

--- ftd.text: Hello
if: $open

--- bar:


-- ftd.column bar:
boolean open: true
$on-click$: toggle $open
$on-click$: stop-propagation
padding: 50
background-color: $green
align: center
cursor: pointer

--- ftd.text: Hello Again
if: $open