Canvas 1 Layer 1 Zone_Blue Zone_Green Path Oval Oval-2 Oval-3 Path arrow - Grey primary Zone_Grey Intersection description optional component_White Shape User optional component_White Intersection description Intersection description Path arrow - Grey primary Path arrow - Grey primary Path arrow - Grey primary Path arrow - Grey primary Path arrow - Grey primary Path arrow - Grey primary Path arrow - Grey primary Path arrow - Grey primary Custom sources Workflows Pub/Sub topic HTTP endpoint Cloud Run functions Cloud Run Eventarc message bus Google sources