Question: making a Cat Scratching Pole.
Option 0: Make 1 base platform, This platform contains 3 wooden parts, multiply the width of the wood by 3 and thats your length, saw 8 parts of the scaffolding wood, Make the platforms square, multiply the width of the wood by 2 and thats your length,  Put 2 parts together to make 1 platform, Saw 4 parts of the narrow shelf under an angle of 45 degrees, 40 cm each. Glue and screw them on the bottom of the platforms,  saw the 4 poles, insert 10mm of a cupper tube with a long screw through them to make the platforms for the poles, add the carpet for scratching.
Option 1: Make 3 base platform, This platform contains 1 wooden parts, multiply the width of the wood by 1.5 and thats your length, saw 4 parts of the ply wood, Make the platforms square, multiply the width of the wood by 2 and thats your length,  Put 4 parts together to make 1 platform, Saw 4 parts of the narrow shelf under an angle of 45 degrees, 40 inches each. Glue and screw them on the bottom of the platforms,  saw the 4 poles, insert 10mm of a cupper tube with a long screw through them to make the platforms for the poles, add the carpet for scratching.
Answer: 0