test web display
indexedfaceset cube
add 1/3 of a cube
add solution visualization to PotW #2
try to fix lineStyle not working in X3DOM
substitute for dashed line style
make internal lines blue
add solution-alt.x3d to the web page
actually add solution-alt.x3d
small improvements
add some text
improve text
add line break
put instructions into separate div
finally fix the layout
add PotW #3 problem statement