\x09\x09 \x09 \x09 \x09 \x09\x09\x09 \x09 \x09 \x09 \x09 \x09\x09 \x09 \x09 \x09\x09 \x09\x09\x09 \x09 \x09 \x09\x09 \x09 \x09 \x09 \x09\x09 \x09
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
Disassemble:
mark null push +13(4b) dup dup getc retr dup push +65(7b) sub jneg +0(0b) dup push +32(6b) mod push +14(4b) div push +26(5b) mul sub add mark +0(0b) putc jump null