if (count traders) != 9
  [
    let missing 9 - (count traders)
    foreach n-values missing
      [
       create-traders 1
       [
          set shape "house"
          setxy random-pxcor random-pycor

          set color red
          ;;give each trader some kinds of products to sell
          set stock n-of n-items-stocked fruit-and-veg
       ]
    ]