
Visual (Changed )
	Change colors
	Make/Remove Highlight
	Lock/Unlock Fields
	Enter/Clear Fields
Signal Out (callback props)
	Signal Problem Loaded
	Signal User Entry/Correctness
	Signal User Clicks/Selection
	Signal Next Demonstration
	Signal Done

Signal In 
	Make highlights
	clear_highlights
	lock_element
	color_element("EXAMPLE","CORRECT"..etc.)


Other
	Initialize
	
	 
