[Pawn] Please help me out with a basic job.

[x3nt1s]

Hey guys I know this is dumb but it's just for training myself I just need some help with a basic job I wanna make since I've been struggling to make even simple things as that. If the player enters any Combine Harvester they get a mark on the map for Checkpoint 1 then when they go through it they gotta go through the next 3 checkpoints and by the end they get $50. They could repeat it over and over to get the money.

The XYZ coordinates are:
21.3124,62.0883,3.1172 = Checkpoint 1
13.2968,37.2150,3.1172 = Checkpoint 2
64.9920,-32.5298,0.7534 = Checkpoint 3
72.8307,19.9228,0.6094 = Checkpoint 4

Thanks in advance.