anchor.diff:  
   : i2c.lcd ( -- )  \ scan and report all I2C devices on the bus
     128 0 do
  -    [ DEBUG ] [if]  cr i h.2 ." : "  [else]  i if cr then  [then]
  +    DEBUG if  cr i h.2 ." : "  else  i if cr then  then
       
       16 0 do
         i j +
  
positive.code: 
  : main
    debug-pwm  +i2c lcd-init
    [ DEBUG 0= ] [if]  ['] lcd-emit hook-emit !  [then]
  
    8686 rf69.freq ! 6 rf69.group ! 62 rf69.nodeid !
    rf69-init 16 rf-power rf-sleep
  
negative.code:     cr 0 font-x ! 0 font-y ! clear i2c.lcd display
      1000 ms
    key? until
  
    ['] serial-emit hook-emit ! ;
  