include Ruby
load_assembly 'Microsoft.Xna.Framework'
include Microsoft::Xna::Framework::Input

class Main
    def initialize
        @sprite = Sprite.new
        @sprite.bitmap = Bitmap.new(32, 32)
        @sprite.bitmap.drawRect(0, 0, 31, 31, Color.new(255, 0, 0))
    end
    def update
        if Input.trigger(Keys.Space)
            @sprite.bitmap.fillRect(1, 1, 30, 30, Color.new(0, 255, 0))
        end
    end
end

$main = Main.new