This is simple program:
main:
djnz r0, main
djnz r1, main
inc p1
dec p3
sjmp main
end

And this is HEX for that program:
:0A000000D8FED9FC059015B080F67B
:00000001FF

So if you have only BASIC compiler put that string to file and program to chip.
Test chips pins. program will increment p1 and decrement p3 in loop with little delay.