Today a fantastic drawing tutorial. We can create a spiral pattern inside a square ðĻ. Drawing optical illusion with doodle sketch & spiral pattern artð with a ruler ð. First I drew a simple, very easy square, then I create inside it straight lines using only two colors. These straight lines are so amazing to obtain spiral pattern with curved lines effect illusion. So an optical illusion drawing on a white paper, very easy for kids and beginners. You can try it yourself. Enjoy with Art Therapy and Drawings Tricks channel, share videos, subscribe for more videos. Subscribe to my YouTube channel, put a like and shares video. Thanks so much. Click below for free subscribe âŽïļ    / @arttherapyanddrawingstricks  #ArtTherapyandDrawingsTricks