processes problems!

[creeping death]

ok...i wrote a program that takes user input within 5 secs 3 times ... the user should enter a number before the timer expires...

here is the code

/* This program checks if the user has "5" as input before the countdown is over or not*/

#include<stdio.h>
#include<stdlib.h>
#include<signal.h>

int main()
{
    int x,i=0,pid,pid2;
    system("clear");
    for(x=0;x<3;x++)
    {
        pid=-1;pid2=-1;
        if((pid=fork()) == 0)   //child process- the countdown timer
        {
            pid=getpid();
            for(i=5;i>0;i--)    //start a 5 sec countdown
            {                   
                printf("X=&#37;d\tenter number(ppid=%d,pid=%d)",x,getppid(),getpid());
                printf("\t\t\t\t\t\t\t%d\a\n",i);
                sleep(1);                                                                     
            }
            exit(666+x);      //exit when 5 secs are over
        }

        else      //parent process
        {       
           if((pid2=fork()) == 0)   //create a seperate child process for input
           { 
                pid2=getpid();
                printf("\n\nscanf pid2=%d\n\n",pid2);
                scanf("%d",&i);
                kill(pid,SIGKILL);     //when input is recieved kill the timer process
                 if(i==5)             //check the user input 
                {
                   printf("\nYES i=5(pid=%d) for x=%d\n\n",getpid(),x);                
                }
                else
                {
                    printf("\nNO i!=5(pid=%d) for x=%d\n\n",getpid(),x);                
                }                 
                exit(777+i);
           }     
           wait();      //wait for child process...timer process.         
           sleep(3);     //take a deep breath
           printf("\n\npid2=%d(i must execute only after wait() is over)\n\n",pid2);                                       
           if((kill(pid2,SIGKILL))==0)  //after the timer child process finishes ,if input process is still running...kill it
           {
               printf("\nNO i!=5(pid=%d) for x=%d\n\n",getpid(),x);//default msg
           }   
        }
    }
    printf("THE END(pid=%d\n",getpid());       //this should be executed when all other child processes are over.
    return 0;    
}

but i get a lot of unexpected behaviour...

this output is one example

#i wont be entering any input whatsoever...
X=0	enter number(ppid=24800,pid=24802)							5


scanf pid2=24803

X=0	enter number(ppid=24800,pid=24802)							4
X=0	enter number(ppid=24800,pid=24802)							3
X=0	enter number(ppid=24800,pid=24802)							2
X=0	enter number(ppid=24800,pid=24802)							1


pid2=24803(i must execute only after wait() is over)


NO i!=5(pid=24800) for x=0 #its ok till here...it waited till timer exited then executed the rest,killing scanf process.

X=1	enter number(ppid=24800,pid=24812)	#new timer process						5


scanf pid2=24813    #new child scanf process

X=1	enter number(ppid=24800,pid=24812)							4
X=1	enter number(ppid=24800,pid=24812)							3


pid2=24813(i must execute only after wait() is over) #why didnt it wait till timer process exited?


NO i!=5(pid=24800) for x=1 #this killed my scanf before the timer expired.

X=1	enter number(ppid=24800,pid=24812)							2
X=2	enter number(ppid=24800,pid=24817)							5


scanf pid2=24818   # x=2 has started before x=1 even finished

X=1	enter number(ppid=24800,pid=24812)							1   
#the sleep(3) statement never executed again
X=2	enter number(ppid=24800,pid=24817)							4
X=2	enter number(ppid=24800,pid=24817)							3
X=2	enter number(ppid=24800,pid=24817)							2


pid2=24818(i must execute only after wait() is over)


NO i!=5(pid=24800) for x=2

THE END(pid=24800    #the parent exits , leaving the timer process an orphan
[c_d@localhost C scratchpad]$ X=2	enter number(ppid=1,pid=24817)							1

the unexpected behaviour is highlighed with red...and commentaries are written by side of output in blue...

please comment.