Create pulse animation and beating heart

Use bloom or selective bloom effects: https://threejs.org/examples/?q=bloom#webgl_postprocessing_unreal_bloom_selective

Some examples of the using of bloom: Sci-fi Scene that I made, Bokeh & Unreal Bloom Website header or something

Some examples of the using of selective bloom: Totentanz (Selective Bloom), Robeast (selective bloom), Nocturnal (selective bloom)
Also, take a look at this cool option from @looeee: Selective UnrealBloomPass issues

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