tui

type Box struct {
	Lines                  []string
	Foreground, Background termbox.Attribute
	Width, Height          int
	X, Y                   int
}

type Canvas struct {
	Foreground, Background termbox.Attribute
	Drawable               Drawable
}

type Cell struct {
	Rune                   rune
	Foreground, Background termbox.Attribute
	X, Y                   int
}

type Drawable interface {
	Draw()
}

type Group []Drawable