examples/steps.aup


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# if / else and else if; the first matching branch runs.
state level = 0
state band = 0
input up = key ArrowUp
input down = key ArrowDown
view shown = band

on up.down {
  level = level + 1
}

on down.down {
  level = level - 1
}

on frame {
  if level > 2 {
    band = 2
  } else if level > 0 {
    band = 1
  } else {
    band = 0
  }
}