DELAY NOT WORKING ACCORDINGLY

#include<reg51.h>

void delay()        //Function to provide a time delay of approx. 1 second. Timer 1.
{
    int i;
    for(i=0;i<20;i++)
    {
        TL1=0xFD;
         TH1=0x4B;
         TR1=1;
         while(TF1==0);
         TR1=0;
         TF1=0;
    }
}


void main()
{
char num[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x67};// Hex values corresponding to digits 0 to 9
        int c;
        while(1)
        {
                for(c=0;c<10;c++)
                {
                P1=num[c];
                delay();

                }
        }
}

Hi guys,
I am not getting delay of 1 sec.blinking rate of 7 segment is too fast in comparison of delay calculated(=1sec). Any help will be appreciated..
thanks