I can't access your link (banned site!) but if I understand what you are after, I suggest you try using lineSymbol to add repeating flags along the side of the way, such as are used in some themes for cliff edges. Locus can use scalable svg as well as png, but if you are using Orux you have to use png.
You should be able to arrange a different offset for different colours so they don't overlap, either by including a blank space in the image (png only, I think) or by use of "dx".
<lineSymbol src="file:/symbols/redpath.svg" dx="0" repeat="true" repeat-gap="10dp" scale="0.4" scale-icon-size="14,1.2" />