Next up: outlining the playing field with the pen tool. Just pick a starting point and start drawing the lines along the walls of the playing field until you have connected them and the area should fill in. (this park is all straight walls, no curves)
Now we need to use the offset tool to create the warning track and the width of the walls surrounding the field. you select the offset tool, plate the mouse on any line you have drawn and click and drag inward. you can release the mouse button and type 10' and the enter and you will have a 10 foot warning track surrounding the field
now do the same for the wall thickness. except drag outside this time. I usually select 6 inches to a foot wide wall