A 4 foot wide raised bed is a lot bigger than the 3 foot ones. I got the two pepper beds finished. They are each 8 feet long. Just need to open up the poly sheeting and and dig a bit of the good dirt out so it's flat or dished and then stack some sticks in the bottom, or cardboard, or both.
I planted a couple of lettuce stumps too that were regrowing in the lower right bed, and put some stakes next to some peas.