How do you cut grass?

First, you buy a gas powered lawnmower, that will save you a lot of time over using scissors. Then, you put gas in the lawnmower. Then, you walk the area to ensure there are no rocks, sticks, or other items that you could run over and potentially run into that could fly out and hurt someone or something. You go start the lawnmower when you its now safe. And you walk behind the mower back and forth in rows typically in the areas that are uncut until you complete the cutting of the entire area you wanted cut.