[求助]汇编--醉汉走路

INCLUDE Irvine32.inc        
walkmax=50                  //一共走50步
startX=25                   //初始坐标
startY=25

Walk STRUCT                         //定义结构体
       path COORD walkmax DUP(<0,0>)
       pathused word 0
Walk ENDS

DisPlayPosition PROTO currX:WORD,currY:WORD      //输出当前坐标
.data
awalk Walk <>
.code
main PROC
mov esi,OFFSET awalk
call TakeWalk
exit
main ENDP

TakeWalk PROC                  //走路
Local currX:WORD,currY:WORD

pushad

mov edi,esi
add edi,OFFSET Walk.path
mov ecx,walkmax
mov currX,startX
mov currY,startY
L1:
mov ax,currX
mov (COORD PTR [edi]).X,ax
mov ax,currY
mov (COORD PTR [edi]).Y,ax
INVOKE DisPlayPosition,currX,currY

mov eax,4                        //判断方向
call RandomRange
.IF eax==0    ;东
inc currX
.ELSEIF eax==1 ;西
dec currX
.ELSEIF eax==2 ;南
inc currY
.ELSE         ;北
dec currX
.ENDIF

add edi,TYPE COORD
loop L1
mov awalk.pathused,walkmax
popad
ret
TakeWalk ENDP

DisPlayPosition PROC  currX:WORD,currY:WORD     //输出当前坐标
.data
fuhao BYTE ",",0
.code
pushad
mov edx,OFFSET fuhao
movzx eax,currX
call WriteDec
call WriteString
movzx eax,currY
call WriteDec
call Crlf
popad
ret
DisPlayPosition ENDP
END main   

我的程序每次执行后输出的内容都是一样的，我想可能是Random引起的，我想知道怎样让它每次输出的内容都
不一样,谁告诉下谢谢.