The cleardevice(); and the following statements is not being executed

Question

I am setting up a slot machine with 3 squares that blink alternatively using double buffering; the while loop is infinite and stops using kbhit() (Which I believe is the mistake), even though the loop stops the commands in the if condition is not executed. rectangle()-A function I wrote to make three squares spaced out equally on the screen.

while(z!=1)
   {
    if(kbhit()!=0)
    {  cleardevice();
       delay(3000);
       bar3d((150),(110),(230),(190),0,0);
       z=1;
       continue;}

    setvisualpage(page);
    setactivepage(1-page);

    settextstyle(3,0,5);
    rectangle((x-190),y,(x+190),(y+60));
    outtextxy((x-120),(y+3),"Slot Machine");

    if(page==0)
       setfillstyle(SOLID_FILL,4);
    else
      setfillstyle(SOLID_FILL,GREEN);

    rectanfle(x,y);
    setfillstyle(SOLID_FILL,BLUE);
    bar3d((x-90),(y+255),(x+90),(y+295),5,5);
    floodfill((x-89),(y+264),WHITE);
    settextstyle(0,0,2);
    outtextxy((x-85),(y+265),"Press Enter");

    page=1-page;
    delay(100);
}