program go_hamster;
uses crt, arena_m, trace_m, creature_m, graphics_m, hamster_m, keys_m, ghost_m,
     debug_m;

const
    DelaySizeMs = 75;

procedure RunLevel;
var
    h, g: creature;
    a: arena;
    t: tracePtr = nil;
    continueLevel: boolean = true;
begin
    Init(a);
    InitHamster(h);
    InitGhost(g);
    DrawCreature(h);
    DrawCreature(g);
    while continueLevel do
    begin
        delay(DelaySizeMs);
        if ArenaSplited(h, t, a) then
        begin
            SetArenaBorder(t, a);
            CutSmallerPart(h, t, a)
        end;
        if keypressed then
            HandleKey(h, continueLevel, a, t);
        if not HamsterStepPossible(h, t, a) then
            StopCreature(h);
        if not ((h.dX = 0) and (h.dY = 0)) then
            MakeHamsterStep(h, t, a);
        MakeEnemyStep(g, a);
        if GhostShouldTurn(g, a) then
            TurnGhost(g, a)
    end
end;

begin
    if not IsTerminalValid then
    begin
        PrintTerminalHelp;
        exit
    end;
    clrscr;
    DrawLevel;
    RunLevel;
    clrscr
end.