How to implement custom markers amg Angular 2+(google maps)?

Question

Angular

Basically, there is something I don't understand at all. Imported amg module. I put a map in the component ... everything works as it should, both the paths and the usual points, but I did not find the docks on how to customize this google marker

<agm-marker  *ngFor="let marker of markers"  [latitude]="marker.coordinates.lat" [longitude]="marker.coordinates.lon"  [iconUrl]="false"></agm-marker>

I need to basically cancel their icon and just make the 20x20 circle white and have 1 more 10x10 circle in it and its color is taken from jason. For example:

<agm-marker  *ngFor="let marker of markers"  [latitude]="marker.coordinates.lat" [longitude]="marker.coordinates.lon" style="border: 5px solid white" [style.backgroundColor]= "'#'+ marker.marker_bg"></agm-marker>

But I can't even figure out why the styles don't go through... they just don't get applied and I can't even cancel the iconUrl...