1. If you click the icon on the right app bar, you can switch to dark mode / light.

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  1. You can play the sound by clicking on three shapes.
    1. The Blue Color plays the sound of water flowing.
    2. The Green Color plays the sound, which is the background of the forest.
    3. The Red Color plays a siren sound.

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  1. If you click the figure you are playing again, the sound will stop playing.