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A blue horizontal rectangle and a red vertical rectangle form a "T" shape on a white background, then the red rectangle expands horizontally into a red rectangle while the blue rectangle shrinks and moves to the bottom left, forming a new configuration. The scene repeats with the "T" shape reappearing, followed by the red rectangle expanding and the blue rectangle moving to the bottom left, then the red rectangle alone appears in the center, and finally the "T" shape reappears. The setting is a plain white background.