removing the far away grass and squirrel objects go through all the objects and see if any need to be deleted for in range(len(grassobjs - - )if isoutsideactivearea(cameraxcameraygrassobjs[ ])del grassobjs[ifor in range(len(squirrelobjs - - )if isoutsideactivearea(cameraxcameraysquirrelobjs[ ])del squirrelobjs[iduring each iteration of the game loopthe code will check all of the grass and enemy squirrel objects to see if they are outside the --active area|the isoutsideactivearea(function takes the current coordinates of the camera (which are stored in camerax and camerayand the grass/enemy squirrel objectand returns true if the object is not located in the active area if this is the casethis object is deleted on line (for grass objectsor line (for squirrel objectsthis is how squirrel and grass objects get deleted when the player moves far enough away from them (or when the enemy squirrels move away far enough from the playerthis ensures that there is always number of squirrels and grass objects near the player when deleting items in listiterate over the list in reverse deleting squirrel and grass objects is done with the del operator howevernotice that the for loop on line and pass arguments to the range(function so that the numbering starts at the index of the last item and then decrements by - (unlike incrementing by as it normally doesuntil it reaches the number - we are iterating backwards over the list' indexes compared to how it is normally done this is done because we are iterating over the list that we are also deleting items from to see why this reverse order is neededsay we had the following list valueanimals ['cat''mouse''dog''horse'so we wanted to write code to delete any instances of the string 'dogfrom this list we might think to write out code like thisfor in range(len(animals))if animals[ ='dog'del animals[ibut if we ran this codewe would get an indexerror error that looks like thistraceback (most recent call last)