I am new but need help with my code. I'm trying to write a program that will produce a continuous pulse with 1 second duration at p1.0

here is my code so far:
.org 0000h
mov tmod, #01h
cpl p1.0
loop: mov th0,#02h
mov tl0,#05h
setb tr0
wait: jnb tf0,wait
sjmp loop