Check my 1 Second delay program using only Timers, commands but no interrupts involved so please give me suggestion for this code without using interrupts

using 16 bit timer mode.

timer has to count 50000 x 20 times = to produce 1000000 microseconds = 1 second

ORG 00H
MOV Ro,#20D
LOOP: MOV TH0,#3CH
MOV TL0,#B0H
MOV TMOD,01B ( setting timer for 16 Bit Mode)
SETB TR0 ( starting timer)
DJNZ R0,LOOP ( this will make 50000 x 20 times)
JNB TF0,$
CPL P1.0
CLR TF0
RET