the current program running multiplies user input by 2 the source is #0+2.1?2,2*1!0 im a genius!!
#0 < set register to 0 +2 < increment register by 2 .1 < push register to memory slot 1 ?2 < ask and set to memory slot 2 ,2 < set register to memory slot 2 *1 < multiply register by memory slot 1 !0 < add to output with code 0