Would you please review my diagram essay?

I am sorry because I cannot attach a photo of the diagram. I don’t know why; it was pretty easy to upload in image before, but now I have tried to upload it for 10 times, and it still not working.

Here is the link to the photo: https://ibb.co/Gx02ykf

The diagram illustrates the process in which raw corn is used to produce ethanol fuel.

Overall, there are three main stages: collecting raw corns for storing, convert these into ethanol fuel that can be used, and delivering them to supermarkets for sales. The second stage is the most intensive, with five steps, which is double the others stages.

In detail, raw corns will be harvested and stored in suitable places for later use in the first stage. What follows is the second stage, beginning with milling these corns into powder, to which water is then added. The mixture from this addition is subsequently cooked for four hours before fermenting for 48 hours. After two days in a fermentation process, the resulting oil liquid is separated from the solid by-product of the previous step and then purified for 5 hours to ensure the ethanol oil is clean and safe to use. In the final stage, final products will be stored for some time before being transported to supermarkets to sell to the customers.