refer to naming convention for lines
specify the line construction
create an svg element to render the result on
add a result representation of a point
specify that a part point should create a result point
update code point coordinates when the result point moves
use a custom trigger to differentiate between updates from the result or from the code'
'
introduce a result line (segment)
introduction of a circle
specify classes of result objects
bring the coordinate axis into the background
[REFACTOR] use last points instead of first