How to create a mission in san andreas

1st
Define your mission
Go and Find

DEFINE MISSIONS (in the decompiled script)
Eg:DEFINE MISSION ### AT @Zero2

2nd

Insert your trigger

Go and Find

create_thread (in the decompiled script)
Eg:004F: create_thread @MissionTrigger

Then Find the mission state/session

[//-------------Mission 0---------------]

:MissionTrigger
0001: wait 0 ms
00D6: if
0256: player $PLAYER_CHAR defined
004D: jump_if_false @MissionTriggerEnd
00D6: if
0038: $ONMISSION == 0
004D: jump_if_false @MissionTriggerEnd
00D6: if
// Place your condition to start your mission
004D: jump_if_false @MissionTriggerEnd
0417: start_mission ###
0004: $ONMISSION = 1

:MissionTriggerEnd
0002: jump @MissionTrigger


Insert your mission

:MissionStart
03A4: name_thread 'NAME'
0050: gosub @MissionBegin
00D6: if
0112: wasted_or_busted
004D: jump_if_false @MissionEnd
0050: gosub @MissionFailed

:MissionEnd
0050: gosub @MissionCleanup
004E: end_thread

:MissionBegin
// This section is where you place the contents of your mission
0051: return

:MissionFailed
// This section is what happens after you died or got busted during your mission
0051: return

:MissionCleanup
// This section is where you clean up the contents of your mission so you can end it
0004: $ONMISSION = 0
00D8: mission_cleanup
0051: return


*This is just an example
you can do much more
thanx gtamodding