title Söprő fejjel tisztítás

participant SnowPlow
participant SweeperHead
participant RoadSection 1
participant RoadSection 2

[-> SnowPlow: 
activate SnowPlow
SnowPlow->SweeperHead: doCleaning(Map, RoadSection 1, SnowPlow)
activate SweeperHead

SweeperHead->RoadSection 1: getRandomParallelRoadSection()
activate RoadSection 1
RoadSection 1-->SweeperHead: RoadSection 2
deactivate RoadSection 1

alt Zúzalék van a földön
    SweeperHead->RoadSection 2: transferGravelTo(from: RoadSection 1)
    activate RoadSection 2
    RoadSection 2-->SweeperHead: 
    deactivate RoadSection 2
else
    SweeperHead->RoadSection 2: transferSnowTo(from: RoadSection 1)
    activate RoadSection 2
    RoadSection 2-->SweeperHead: 
    deactivate RoadSection 2
end

SweeperHead-->SnowPlow: 
deactivate SweeperHead
[<-- SnowPlow: 
deactivate SnowPlow