[Kmitska]

Hey, thats almost the whole script you need lol
I guess it will help you a bit

new Team1[MAX_PLAYERS];
new Team2[MAX_PLAYERS];
new score1,score2;

public OnPlayerDeath(playerid, killerid, reason)
{

if(Team1[killerid] != Team1[playerid]) // if it is not a teamkill
{
score1 ++;
if(score1 == 100)
{
//write here that the team 1 has won etc.
return 0;
}
}

if(Team2[killerid] != Team2[playerid]) // if it is not a teamkill
{
score2 ++;
if(score2 == 100)
{
//write here that the team 2 has won etc.
return 0;
}
}
return 1;
}