Simple bar script

class Window_Base < Window


    def bar_color(n)
        case n
        when 0
            return Color.new(0, 0, 0)  # black
        when 1
            return Color.new(0, 255, 0)  # green
        when 2
            return Color.new(0, 0, 255)  # blue
        when 3
            return Color.new(255, 0, 0)  # red
        end
    end

    def draw_hp_bar(actor, x, y, w = 100)
        hp = actor.hp
        max_hp = actor.maxhp
        border_color = bar_color(0)
        health_color = bar_color(1)
        hp_percentage = hp * 1.0 / max_hp
        health_fill = w * hp_percentage
        border = Rect.new(x - 1, y, w + 2, 10)
        health = Rect.new(x, y, health_fill, 8)
        self.contents.fill_rect(border, border_color)
        self.contents.fill_rect(health, health_color)
    end

end