Weird illusions and drawings!
https://www.bing.com/images/search?q=impossible+circle&view=detailv2&&id=A405FC089E217BCA7FA12C599B6D8900892CA170&selectedIndex=2&ccid=YDSf0zZb&simid=608049365906949398&thid=OIP.M60349fd3365be89aef1fb672e4f653e0H0 https://www.bing.com/images/search?q=+impossible+hexagon&view=detailv2&&id=CD22A4E5A588EF3B45490D02126A5A41F29F69F9&selectedIndex=8&ccid=66oXsG1W&simid=608000222895408500&thid=OIP.Mebaa17b06d56faed6fa2db0446b55eebo0
