\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 +1(1b) dup dup geti retr mark +0(0b) dup jzero -0(0b) swap copy +1(1b) mul swap push +1(1b) sub jump +0(0b) mark -0(0b) pop puti push +10(4b) putc jump null