/Bridge Lucky
type=entity,ID=LuckyProjectile,pos=#bowPos,NBTTag=(Motion=#bowMotion,item=(id=lucky:traffic_lucky_bow),trail=(frequency=0.1,drops=["type=block,ID=wooden_slab,delay=0.4","type=block,ID=wooden_slab,meta=3,delay=0.4@chance=0.3"]),impact=["group(type=message,ID="$6$oBridge successfully created!")"])@luck=2@chance=0.69

/Bridge Unlucky
type=message,ID="$4$oError while generating bridge..."@luck=-2@chance=1.31