create a Objective Description essay

the report should have three part structure 

1.overview of the Mechanism or Object.: provide reader with necessary background and a description of the general apperance.

2.Description of thr Major parts: provides the reader with detailed and parallel descriptions of the major parts and their functions.

3.Description of the Mechanism in Operation or the Obejct in Use: typically describes one full cycle of operation, but may describe the uses to which an object can be put.