集装箱房屋制作过程:谁能用QB编个游戏。？？

找了一个pascal程序，QB爱好者一般能看明白……
俄罗斯方块
注：uses是调用系统内部编译；
每句话后都有“；”；
数组都是在[]中；
procedure=sub;
readln,writeln是读/写回车符

USES Crt;
CONST
Change:Array [0..6,0..3,0..7] Of Byte =(((0,1,1,1,2,1,3,1),(1,0,1,1,1,2,1,3),(0,1,1,1,2,1,3,1),(1,0,1,1,1,2,1,3)),
((1,0,0,1,1,1,2,1),(1,0,1,1,1,2,2,1),(0,1,1,1,2,1,1,2),(1,0,0,1,1,1,1,2)),
((1,0,2,0,1,1,2,1),(1,0,2,0,1,1,2,1),(1,0,2,0,1,1,2,1),(1,0,2,0,1,1,2,1)),
((1,0,2,0,0,1,1,1),(0,0,0,1,1,1,1,2),(1,0,2,0,0,1,1,1),(0,0,0,1,1,1,1,2)),
((0,0,1,0,1,1,2,1),(1,0,0,1,1,1,0,2),(0,0,1,0,1,1,2,1),(1,0,0,1,1,1,0,2)),
((1,0,2,0,1,1,1,2),(0,0,0,1,1,1,2,1),(1,0,0,2,1,1,1,2),(2,2,0,1,1,1,2,1)),
((0,0,1,0,1,1,1,2),(2,0,0,1,1,1,2,1),(2,2,1,0,1,1,1,2),(0,2,0,1,1,1,2,1)));
VAR
Board:Array [0..3,0..11,1..25] Of Byte;
Players,N,Nowx,Nowy,Kind,Trans,Speed:Byte;
Time,Score:Word;
Now:Array [0..7] Of Byte;
PROCEDURE Furbish;
VAR B,C:Byte;
Begin
For C:=24 Downto 2 Do Begin
Gotoxy(1,C);
For B:=1 To 10 Do
If Board[0,B,C]=0 Then Write(' ')
Else Write('圹');
End;
End;
PROCEDURE Clear;
Var A,B,C:Byte;D:Boolean;
Begin
For A:=24 Downto 1 Do
Begin
D:=True;
For B:=1 To 10 Do
If Board[0,B,A]=0 Then D:=False;
If D=True Then
Begin
Score:=Score+10;Gotoxy(1,1);Write(Score:5,'0');
For C:=A Downto 2 Do
For B:=1 To 10 Do
Board[0,B,C]:=Board[0,B,C-1];
A:=A+1;
End;
End;
Furbish;
End;
FUNCTION Canmove(X,Y:Byte):Boolean;
BEGIN
Canmove:=True;
If Board[0,X+Now[0],Y+Now[1]]>0 Then Canmove:=False;
If Board[0,X+Now[2],Y+Now[3]]>0 Then Canmove:=False;
If Board[0,X+Now[4],Y+Now[5]]>0 Then Canmove:=False;
If Board[0,X+Now[6],Y+Now[7]]>0 Then Canmove:=False;
End;
PROCEDURE Clean;
Begin
Gotoxy((Nowx+Now[0])*2-1,Nowy+Now[1]);Write(' ');
Gotoxy((Nowx+Now[2])*2-1,Nowy+Now[3]);Write(' ');
Gotoxy((Nowx+Now[4])*2-1,Nowy+Now[5]);Write(' ');
Gotoxy((Nowx+Now[6])*2-1,Nowy+Now[7]);Write(' ');
End;
PROCEDURE Show;
Begin
Gotoxy((Nowx+Now[0])*2-1,Nowy+Now[1]);Write('圹');
Gotoxy((Nowx+Now[2])*2-1,Nowy+Now[3]);Write('圹');
Gotoxy((Nowx+Now[4])*2-1,Nowy+Now[5]);Write('圹');
Gotoxy((Nowx+Now[6])*2-1,Nowy+Now[7]);Write('圹');
End;
BEGIN
Fillchar(Board,Sizeof(Board),0);
Randomize;Score:=0;
For N:=1 To 24 Do
Board[0,0,N]:=1;
For N:=1 To 24 Do
Board[0,11,N]:=1;
For N:=1 To 10 Do
Board[0,N,25]:=1;
Window(31,2,50,25);Textcolor(White);Textbackground(Blue);
Clrscr;Window(31,2,51,25);
Speed:=1;
Kind:=Random(7);Trans:=Random(4);Nowx:=4;Nowy:=1;
For N:=0 To 7 Do
Now[N]:=Change[Kind,Trans,N];
While Canmove(Nowx,Nowy) Do
Begin
Repeat
Clean;Nowy:=Nowy+1;Show;
Repeat
If Keypressed Then
Case Upcase(Readkey) Of
#0:Case Readkey Of
#75:If Canmove(Nowx-1,Nowy) Then Begin Clean;Nowx:=Nowx-1;Show;End;
#77:If Canmove(Nowx+1,Nowy) Then Begin Clean;Nowx:=Nowx+1;Show;End;
#80:Begin Clean;Repeat
If Canmove(Nowx,Nowy+1) Then Nowy:=Nowy+1;
Until Not(Canmove(Nowx,Nowy+1));Show;End;
#61:Begin Gotoxy(9,12);Write('Pause');Repeat Delay(1000);Until Keypressed;Furbish;End;
End;
#27:Exit;
' ',#13:Begin
Clean;Trans:=Trans+1;
If Trans=4 Then Trans:=0;
For N:=0 To 7 Do
Now[N]:=Change[Kind,Trans,N];
If Not(Canmove(Nowx,Nowy)) Then Begin Trans:=Trans-1;For N:=0 To 7 Do
Now[N]:=Change[Kind,Trans,N];Show;End
Else Show;
End;
End;
Until Not(Keypressed);
Delay((10-Speed)*50);
Until Not(Canmove(Nowx,Nowy+1));
Score:=Score+1;Gotoxy(1,1);Write(Score:5,'0');Speed:=(Score Div 300)+1;
Board[0,Nowx+Now[0],Nowy+Now[1]]:=1;
Board[0,Nowx+Now[2],Nowy+Now[3]]:=1;
Board[0,Nowx+Now[4],Nowy+Now[5]]:=1;
Board[0,Nowx+Now[6],Nowy+Now[7]]:=1;
Clear;
Kind:=Random(7);Trans:=Random(4);Nowx:=4;Nowy:=1;
For N:=0 To 7 Do
Now[N]:=Change[Kind,Trans,N];
End;
Gotoxy(7,12);Write('GAME OVER');Readln;
END.