Art Deco Coaster - Optical Illusion

An optical illusion (also called a visual illusion) is characterized by visually perceived images that differ from objective reality. The information gathered by the eye is processed in the brain to give a perception that does not tally with a physical measurement of the  stimulus source. - from Wikipedia Do not trust your eyes. Café Wall Illusion - The horizontal lines are actually parallel. Tumbling Blocks - Are these blocks concave or convex?  Fraser Spiral - The spirals are actually concentric circles. Hermann Grid - Black dots flash and disappear at intersections.    Features of Art Deco Coaster Storytelling with beautiful patterns Our narratives take the form of beautiful patterns and designs. We have designed a series of themed story pattern, intended as a boutique of all kinds of household decorations. In the creation of logical , we did set the following principles: Thematic: derived from the natural and cultural areas of our concern. Story: behind the pattern can be a wonderful story. Style: using the most appropriate style of performance on this topic. Color: use the harmonious combination of four basic colors of red, yellow, blue & green.  The content of first creations cover the natural biological and the humanities, and apply as ornamentation of coaster. Specification Dimensions: L 88 x W 88 x H 0.2 mm x 4 Material: Waterproof card paper Weight: 10 g