Universe Quiz 4
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Clicking with a mouse in a window cycles the shape showing: nothing -> circle -> triangle -> square -> nothing (repeatedly).
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The “e” key erases all shapes in every window.
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The “n” key moves a shape to the “next” window. If there is already a shape there it is replaced by the incoming shape.
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The “p” key moves a shape to the “previous” window, as above.
Challenges
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The shape also has a number indicating which world it originated in. That number goes with the shape as it moves.
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Add color of the shape, with “c” to cycle the color.