main()
{
    int x1,x2,y1,y2,x,y,r,n;
    while(1)
    {
        cls(1);
        n=250;
        while(n!=0)
        {
            x1=(rand()/52)+4;
            x2=(rand()/52)+4;
            y1=0-((rand()/69)+3);
            y2=0-((rand()/69)+3);
            line(x1,y1,x2,y2);
            n--;
        }
        cls(1);
        n=250;
        while(n!=0)
        {
            x1=(rand()/52)+4;
            x2=(rand()/52)+4;
            y1=0-((rand()/69)+3);
            y2=0-((rand()/69)+3);
            rectangle(x1,y1,x2,y2);
            n--;
        }
        cls(1);
        n=250;
        while(n!=0)
        {
            x=(rand()/52)+4;
            y=0-((rand()/69)+3);
            r=rand()/655;
            circle(x,y,r);
            n--;
        }
    }
}