anchor.diff:  extends layout
   
  -block content
  +block head
   	script(type='text/javascript', src='/js/sumorobot.js')
   	script(type='text/javascript', src='/js/blockly/blockly_compressed.js')
   	script(type='text/javascript', src='/js/blockly/blocks_compressed.js')
  
positive.code: 
  	xml#toolbox(style="display: none").
  		<block type="controls_if"></block>
  		<block type="sumorobot_opponent"></block>
  		<block type="sumorobot_line"></block>
  		<block type="sumorobot_move"></block>
  
  	div.blockly-wrapper
  		div#blockly-div
  
negative.code: 	script(type='text/javascript', src='/js/blockly/javascript_compressed.js')
  	script(type='text/javascript', src='/js/blockly/msg/js/en.js')
  
  block body
  	h1 Sumorobot programming
  	div#video
  		//img(src="http://localhost:8080/?action=stream")
  