Start it by pressing space The longest part was testing for the largest possible size to make an up to 10 sided polygon without making a visible tear in the shape. Lines for small decoration integrity Largest possible polygon (triangle to decagon) triangle: 212 & -212 square: 184 & -184 pentagon: 120 & -120 hexagon: 106 & -106 heptagon: 83 & -83 octagon: 76 & -76 nonagon: 64 & -64 decagon: 58 & -58