[Norn]

Simple:

pawn Код:

//top of script
new AdminDuty[MAX_PLAYERS];

//OnPlayerConnect
AdminDuty[playerid] = 0;

//Admin duty command
AdminDuty[playerid] = 1;
//SetPlayerColor, Health Etc.

//Checking if an admin is on duty
if(AdminDuty[playerid])
{
//Do Stuff
}

You need to experiment more with variables, then things will be alot easier.