procedure main()

every !(!(L  := list(10)) := list(10))  := ?20   # setup a 2d array of random numbers up to 20

every i := 1 to *L do                            # using nested loops
   every j := 1 to *L[i] do
      if L[i,j] = 20 then
         break break write("L[",i,",",j,"]=20")

end