[GeorgeLimit]

how can I make checkpoints that can be entered, I'm a new scripter

[andrejc999]

Use this to create a checkpoint:
https://sampwiki.blast.hk/wiki/Function:SetPlayerCheckpoint
Use this to check if a player has entered the checkpoint:
https://sampwiki.blast.hk/wiki/OnPlayerEnterCheckpoint

EDIT: You can use SAMP Wiki to learn new functions and other stuff about SAMP scripting. There is pretty much everything there.