HTML5 canvas coin spin effect with Konva

This is something I made for fun when I was learning about Konva tweens and animation, and posted as a self-answered question on StackOverflow.

The coin spin effect is done by scaling the X axis of the circle from 1 to 0 to 1 in a loop. The human brain is defeated by the simple process of changing something on the ‘coin’ as it ‘spins’. In this case I show the text when the coin is on cycle-1 of the scaling, then remove it on cycle-2. It would be as simple to change the color or use different text, or use a photo.

Thanks for reading.

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