See

Visual information arrives from the server in the following basic format:

(see Time ObjectInfo ObjectInfo ...)

where

ObjectInfo = (ObjName Distance Direction
               DistChng DirChng BodyDir HeadDir )

and

    ObjName  ::=  
    (player Teamname UniformNumber)
          | (goal [l|r])
          | (ball)
          | (flag c)
          | (flag [l|c|r] [t|b])
          | (flag p [l|r] [t|c|b])
          | (flag g [l|r] [t|b])
          | (flag [l|r|t|b] 0)
          | (flag [t|b] [l|r] [10|20|30|40|50])
          | (flag [l|r] [t|b] [10|20|30])
          | (line [l|r|t|b])