assembly code for counter

I want make counter program for 8051 controller in assembly that count 0 to 4 I know I have to use display but first think I want to learn how we write instruction for counter in assembly 8051 has two timer timer0 and timer1 each has 16 bit registers

set control bit means timer start
TR0=1; start timer
TR1=1; start timer

clear control bit means stop the timer

TR0=0; stop timer
TR1=0; stop timer

TIME MODE- there are four mode of timer
mode 0
mode 1
mode 2
mode 3

now I know how to set bit how to clear bit and timer mode

my problem is that I have no idea how to start please anyone will help me to write code only for timer not for display I will learn later first for timer