## mark a section (Learn more)

Shoes.app :width => 150, :height => 150 do def toggle_rectangle_color color fill color rect 0, 0, 150, 150 end every(3) do case @color when blue clear {toggle_rectangle_color red} @color = red when red clear {toggle_rectangle_color blue} @color = blue else end end @color = blue toggle_rectangle_color @color end

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