anchor.diff:    red = parseInt(c[1..2], 16)
     green = parseInt(c[3..4], 16)
     blue = parseInt(c[5..6], 16)
  -  "rgb_led(#{pin}).on(red: #{red}, green: #{green}, blue: #{blue})"
  +  "rgb_led(#{pin}).on(red: #{red}, green: #{green}, blue: #{blue})\n"
   
   # RGB LED[▼ピン]をオフにする
   <% n = "#{category}_rgb_led_off" %>
  
positive.code: 
  Blockly.Ruby['<%= n %>'] = (block) ->
    pin = parseInt(@.getTitleValue('PIN'))
    "led(#{pin}).<%= method %>"
  <% end %>
  
  # 「RGB LED」サブジャンル
  
negative.code: 
  Blockly.Ruby['<%= n %>'] = (block) ->
    pin = parseInt(@.getTitleValue('PIN'))
    "rgb_led(#{pin}).off\n"
  
  # 「7セグディスプレイ」サブジャンル
  
  