+ stroke: color_crayon
+ stroke-width: 4
+ stroke-linecap: butt
+ stroke-linejoin:miter
+ // this doesn't work in firefox: filter: url(#crayon)
+ rect.box, path.polyline
+ stroke: color_crayon
+ rect.box.hover, path.polyline.hover
+ stroke: color_hover
+ rect.box.dragging, path.polyline.dragging
+ stroke: color_dragging
+ rect.box.selected, path.polyline.selected
+ stroke: color_selected